Microsoft teams ошибка 0xcaa70004

Код ошибки caa70004 в Microsoft Teams

Сбой caa7004 в Майкрософт Тимс появляется при открытии программы, в момент входа в учетную запись или во время подключения к онлайн-конференции. Встречается он нечасто, но сильно осложняет жизнь пользователям. Особенно неприятно, когда даже перезагрузка не помогает. Что же делать, когда возникает код ошибки caa70004 в Microsoft Teams? Именно этому вопросу посвящена наша статья.

Решение проблемы

Выглядит данный сбой следующим образом:

В первую очередь при его появлении перезапустите ПК, если еще этого не делали. Многие проблемы и системные сбои удается устранить таким способом. Начинать нужно с такого решения. А если оно не помогло, то придется перейти к более сложному.

Суть данной ошибки в том, что компьютер пользователя не может подключиться к серверам Микрософт Тимс. Это может быть связано с:

• Старой версии программы.
• Некорректной работой антивируса.
• Сбоем настроек подключения в операционной системой.
• Неполадками с роутером.
• Забитым кэшем программы и браузера.

Разберемся с каждым случаем по отдельности.

Вариант №1: Устаревший Майкрософт Тимс

На официальном сайте программы указано, что корректная работа гарантируется только при использовании последней версии MS Teams. А значит, появление проблем может быть связано с тем, что новое обновление еще не установлено. Решение – установить его вручную. Для этого:

1. В окне программы нажмите на миниатюру пользователя, чтобы открыть контекстное меню.
2. Активируйте пункт «Проверить наличие обновлений».
3. Подождите, пока проверка завершится.
4. При необходимости перезагрузите Тимс.

Вариант №2: Антивирус

Антивирусная защита в некоторых ситуациях мешает корректной работе программ. Например, она может заблокировать подключение MS Teams к интернету. Решение тут одно – на время приостановить работу антивируса. Если это помогло, то программу стоит добавить список исключений.

Вариант №3: Системный сбой

В Windows может с течением времени случиться ситуация, когда настройки сетевого подключения собьются. А значит, их нужно сбросить до исходных значений. Делается это с помощью одной консольной команды.

1. Вызовите меню «Пуск».
2. Пролистайте его вниз и откройте каталог «Служебные».
3. Кликните правой клавишей мыши на графу «Командная строка».
4. Выберите опцию запуска «от имени администратора».
5. Введите в текстовое поле команду netsh winsock reset .
6. Нажмите Enter , чтобы выполнить ее.
7. Перезапустите компьютер.

Вариант №4: Проблемы с Wi-Fi-роутером

Если вы подключены к интернету через Wi-Fi-роутер, то появление сбоя с кодом caa70004 может быть вызвано именно им. В настройках устройства мы копаться не рекомендуем. Попробуйте просто его перезапустить (выключить и включить). Как ни странно, это может помочь.

Вариант №5: Избыток кэш-файлов

В кэш сохраняются те данные, которые загружались в Teams с течением времени – аватары пользователей, показанные презентации и т. д. И если он забит или файлы оттуда повреждены, то могут возникнуть неполадки. Решение тут – ручная чистка. Но предварительно следует удалить программу.

Вот пошаговая инструкция:

1. Нажмите Win + R .
2. Выполните команду appwiz.cpl .
3. Найдите в списке MicrosoftTeams.
4. Щелкните правой кнопкой мыши по этой графе.
5. Выберите опцию удаления.
6. Закройте окно «Программы и компоненты».
7. Снова нажмите Win + R .
8. Теперь выполните команду %AppData%Microsoft .
9. В открывшемся каталоге отыщите папку Teams.
10. Безвозвратно удалите ее (с чисткой корзины).
11. Этот шаг нужен только для пользователей Google Chrome. Если у вас другой браузер, то переходите к шагу номер 14. Опять нажмите Win + R .
12. Выполните команду %LocalAppData%GoogleChromeUser DataDefault .
13. Очистите содержимое каталогов Cache, Cookies и Web Data.
14. Откройте InternetExplorer через меню «Пуск» (каталог «Стандартные» в самом низу).
15. В окошке браузера нажмите клавишу Alt на клавиатуре, чтобы вызвать панель управления.
16. Кликните по вкладке «Сервис».
17. Откройте пункт «Свойства…».
18. Во вкладке «Дополнительно» нажмите «Сброс…».
19. Отметьте галочкой пункт «Удалить личные данные» и опять нажмите «Сброс».
20. Перезапустите ПК.
21. Откройте страницу загрузки Microsoft Teams.
22. Кликните по кнопке «Скачать…».
23. Откройте сохраненный exe-файл.
24. Дождитесь запуска программы.
25. Войдите в свою учетную запись.

Источник

Fix Microsoft Teams Error code caa70004 in Windows 11/10

If when you try to start the Microsoft Teams desktop app on your Windows 11 or Windows 10 computer, but receive the Error code caa70004, then this post is intended to help you with the most adequate solutions to fix the issue. Microsoft Teams is a communication platform developed by Microsoft office; it allows your team to stay organized and have conversations. Although Microsoft Team is an excellent platform for discussion, customers can experience such errors.

When you encounter this issue, you will receive the following error message:

Error code – caa70004
There’s a more permanent way to sign in to Microsoft Teams. If you’re having trouble completing the process, talk to your IT admin.

Why am I getting an error code on Teams?

There could a number of reasons PC users are getting error codes on Teams. It could be you’re not using the right credentials. The Windows Credentials you signed in with are different than your Microsoft 365 credentials. In this case, to resolve the issue, try to sign in again with the correct email/password credentials. If you continue to receive this status code contact your IT admin.

Microsoft Teams Error code caa70004

PC users that are faced with Microsoft Teams Error code caa70004 on Windows 11/10 system, can try our recommended solutions below in no particular order and see if that helps to resolve the issue.

1. Run Microsoft Teams with admin privilege
2. Run Teams in Compatibility Mode
3. Enable TLS in Internet Options
4. Disable VPN (if applicable)
5. Clear cache of Microsoft Teams
6. Enable Forms-based Authentication and WS-Trust in your ADFS
7. Use Teams Web version
8. Log out of Microsoft Teams and clear cache
9. Reset the Internet Options
10. Close background programs
11. Add your Office account to the user list.

Let’s take a look at the description of the process involved concerning each of the listed solutions.

1] Run Microsoft Teams with admin privilege

You can begin troubleshooting of this Microsoft Teams Error code caa70004 by running Teams with admin privilege. Try the next solution if this didn’t work for you.

2] Run Teams in Compatibility Mode

This solution requires you to run Teams in compatibility mode and see if that helps. Proceed with the next solution if this wasn’t helpful.

3] Enable TLS in Internet Options

This solution requires you to enable TLS in Internet Options on your Windows 11/10 device. To enable the TLS, follow the steps below.

Type Internet Options in the search bar and select it from the pop-up panel.

Once the Internet Properties interface is open, select the Advanced Settings tab.

Under the Security section, check to see if you have TLS 1.1 enabled and TLS 1.2 enabled; if not, check their checkboxes to enable them.

Select OK to save the changes.

Try to run Microsoft Teams to see if the issue persists.

4] Disable VPN (if applicable)

A VPN client or a Proxy server could trigger this error due to some kind of interference that ends up blocking communications between your Windows 11/10 client machine and Teams cconnection server. In this case, you can try uninstalling your VPN software via the Programs and Features applet on your system or remove any proxy server from your computer and see if that resolves the issue.

5] Clear cache of Microsoft Teams

To clear Microsoft Teams cache on your Windows PC, do the following:

• Quit Teams from the notification area on the taskbar.
• Next, press Windows key + R to invoke the run dialog.
• In the Run dialog box, type or copy and paste the environment variable below and hit Enter:

• At the location, press CTRL + A keyboard shortcut to select all the files in the folder.
• Tap DELETE key on you keyboard or right-click the selected contents and select Delete for the context menu.
• Once done, exit File Explorer.

Check if you can start Teams without errors. If the error reappears, try the next solution.

6] Enable Forms-based Authentication and WS-Trust in your ADFS

To enable Forms-based authentication, follow the instructions in this guide Modern authentication failed, Status code 4c7 – Microsoft Teams error. If the issue persists, try the next solution.

7] Use Teams Web version

If at this point nothing seems to work for now, your best workaround is to use the web version of Microsoft Teams at teams.microsoft.com. The web version works and you can be able to run Teams for multiple tenants.

8] Log out of Microsoft Teams and clear cache

The cause of the error may be due to the cache of files of Microsoft Teams, which consists of outdated data. To clear the cache, follow the steps below.

Sign out of your account and ensure that Microsoft Teams is not running in the background.

Press the Win + R key to open the Run dialog box.

In the dialog box, type %App Data%Microsoftteamscache.

This will take you to the folder:

Delete all files from this folder.

Try to launch Microsoft Teams to see if the error continues.

9] Reset the internet options

You can fix the issue by trying to reset the Internet Options.

Sign out of your account and ensure that Microsoft Teams is not running in the background.

Then Type Internet Options in the search bar and select it from the pop-up panel.

On the Internet Option interface, click the Advanced tab.

Then, scroll down and click the Reset button.

Close the window and try to launch Microsoft Teams.

10] Close background programs

Apps or programs running in your background might trigger Microsoft Teams causing the error to occur, and the solution is to close the apps. To close the apps, follow the steps below.

Go to Task Manager.

Once the Task Manager interface opens, click the Processes tab.

Then right-click the program you want to close and click End Task from the context menu.

Try to launch Microsoft Teams to see if the error continues.

11] Add your office account to the user list

Click the Start button and click Settings.

On the Settings interface, click Accounts.

Then click Access Work or School on the left pane.

Click the + Connect button on the right, then log in using your office 365 credentials.

Try to open Microsoft Teams again.

How do I clear MS Teams cache?

For some reason PC users may want to clear the Microsoft Teams cache. To clear the Microsoft Teams cache on Windows 11/10, follow these instructions: Fully quit Microsoft Teams and ensure it’s not still running in the system tray/notification area in the taskbar. Next, navigate to %appdata%/Microsoft/Teams in File Explorer. At the location, select everything in the folder and delete the contents of the folder. Open Teams and wait for it to download required files.

How do I fix Microsoft Team error?

Specifically for IT admin, you can troubleshoot Microsoft Teams integration with customer engagement apps in Dynamics 365, by following these instructions: From the menu select Settings > Services & add-ins. Find Microsoft Teams and then enable External Apps. Set Allow external app in Microsoft Teams to On. Restart Microsoft Teams and then try searching for Dynamics 365 again in the Microsoft Teams app store.

How do you restart a Microsoft team?

Specifically intended for Mac users, you can restart Microsoft Teams by following these instruction for resetting the Microsoft Teams app in Mac using the Self Service app: Right Click on the Microsoft Teams Icon in the Dock. Select Quit. Select the MSU Branded Self Service app from the Launch Pad. Enter Teams in the search bar. Select Reset under Reset Microsoft Teams.

What is Microsoft Teams Error caa70004?

Microsoft Team error caa70004, We are sorry, we’ve run into an issue prevents you from logging into Teams and joining the discussion. It is usually caused due to Network issues.

What are the causes for Microsoft Team error caa70004?

Microsoft Team error caa70004 may be caused by some issues such as network problems; caching issues, server issues, and sign-in problems.

Источник

If when you try to start the Microsoft Teams desktop app on your Windows 11 or Windows 10 computer, but receive the Error code caa70004, then this post is intended to help you with the most adequate solutions to fix the issue. Microsoft Teams is a communication platform developed by Microsoft office; it allows your team to stay organized and have conversations. Although Microsoft Team is an excellent platform for discussion, customers can experience such errors.

When you encounter this issue, you will receive the following error message:

Error code – caa70004
There’s a more permanent way to sign in to Microsoft Teams. If you’re having trouble completing the process, talk to your IT admin.

Why am I getting an error code on Teams?

There could a number of reasons PC users are getting error codes on Teams. It could be you’re not using the right credentials. The Windows Credentials you signed in with are different than your Microsoft 365 credentials. In this case, to resolve the issue, try to sign in again with the correct email/password credentials. If you continue to receive this status code contact your IT admin.

PC users that are faced with Microsoft Teams Error code caa70004 on Windows 11/10 system, can try our recommended solutions below in no particular order and see if that helps to resolve the issue.

1. Run Microsoft Teams with admin privilege
2. Run Teams in Compatibility Mode
3. Enable TLS in Internet Options
4. Disable VPN (if applicable)
5. Clear cache of Microsoft Teams
6. Enable Forms-based Authentication and WS-Trust in your ADFS
7. Use Teams Web version
8. Log out of Microsoft Teams and clear cache
9. Reset the Internet Options
10. Close background programs
11. Add your Office account to the user list.

Let’s take a look at the description of the process involved concerning each of the listed solutions.

1] Run Microsoft Teams with admin privilege

You can begin troubleshooting of this Microsoft Teams Error code caa70004 by running Teams with admin privilege. Try the next solution if this didn’t work for you.

2] Run Teams in Compatibility Mode

This solution requires you to run Teams in compatibility mode and see if that helps. Proceed with the next solution if this wasn’t helpful.

3] Enable TLS in Internet Options

This solution requires you to enable TLS in Internet Options on your Windows 11/10 device. To enable the TLS, follow the steps below.

Type Internet Options in the search bar and select it from the pop-up panel.

Once the Internet Properties interface is open, select the Advanced Settings tab.

Under the Security section, check to see if you have TLS 1.1 enabled and TLS 1.2 enabled; if not, check their checkboxes to enable them.

Select OK to save the changes.

Try to run Microsoft Teams to see if the issue persists.

4] Disable VPN (if applicable)

A VPN client or a Proxy server could trigger this error due to some kind of interference that ends up blocking communications between your Windows 11/10 client machine and Teams cconnection server. In this case, you can try uninstalling your VPN software via the Programs and Features applet on your system or remove any proxy server from your computer and see if that resolves the issue.

5] Clear cache of Microsoft Teams

To clear Microsoft Teams cache on your Windows PC, do the following:

• Quit Teams from the notification area on the taskbar.
• Next, press Windows key + R to invoke the run dialog.
• In the Run dialog box, type or copy and paste the environment variable below and hit Enter:

%AppData%MicrosoftTeamscache

• At the location, press CTRL + A keyboard shortcut to select all the files in the folder.
• Tap DELETE key on you keyboard or right-click the selected contents and select Delete for the context menu.
• Once done, exit File Explorer.

Check if you can start Teams without errors. If the error reappears, try the next solution.

6] Enable Forms-based Authentication and WS-Trust in your ADFS

To enable Forms-based authentication, follow the instructions in this guide Modern authentication failed, Status code 4c7 – Microsoft Teams error. If the issue persists, try the next solution.

7] Use Teams Web version

If at this point nothing seems to work for now, your best workaround is to use the web version of Microsoft Teams at teams.microsoft.com. The web version works and you can be able to run Teams for multiple tenants.

8] Log out of Microsoft Teams and clear cache

The cause of the error may be due to the cache of files of Microsoft Teams, which consists of outdated data. To clear the cache, follow the steps below.

Sign out of your account and ensure that Microsoft Teams is not running in the background.

Press the Win + R key to open the Run dialog box.

In the dialog box, type %App Data%Microsoftteamscache.

This will take you to the folder:

C:Users%yourname%AppDataRoamingMicrosoftteamscache

Delete all files from this folder.

Try to launch Microsoft Teams to see if the error continues.

Related: Fix Microsoft Teams Sign-in Errors and Problems.

9] Reset the internet options

You can fix the issue by trying to reset the Internet Options.

Sign out of your account and ensure that Microsoft Teams is not running in the background.

Then Type Internet Options in the search bar and select it from the pop-up panel.

On the Internet Option interface, click the Advanced tab.

Then, scroll down and click the Reset button.

Close the window and try to launch Microsoft Teams.

10] Close background programs

Apps or programs running in your background might trigger Microsoft Teams causing the error to occur, and the solution is to close the apps. To close the apps, follow the steps below.

Go to Task Manager.

Once the Task Manager interface opens, click the Processes tab.

Then right-click the program you want to close and click End Task from the context menu.

Try to launch Microsoft Teams to see if the error continues.

11]  Add your office account to the user list

Click the Start button and click Settings.

On the Settings interface, click Accounts.

Then click Access Work or School on the left pane.

Click the + Connect button on the right, then log in using your office 365 credentials.

Try to open Microsoft Teams again.

How do I clear MS Teams cache?

For some reason PC users may want to clear the Microsoft Teams cache. To clear the Microsoft Teams cache on Windows 11/10, follow these instructions: Fully quit Microsoft Teams and ensure it’s not still running in the system tray/notification area in the taskbar. Next, navigate to %appdata%/Microsoft/Teams in File Explorer. At the location, select everything in the folder and delete the contents of the folder. Open Teams and wait for it to download required files.

How do I fix Microsoft Team error?

Specifically for IT admin, you can troubleshoot Microsoft Teams integration with customer engagement apps in Dynamics 365, by following these instructions: From the menu select Settings > Services & add-ins. Find Microsoft Teams and then enable External Apps. Set Allow external app in Microsoft Teams to On. Restart Microsoft Teams and then try searching for Dynamics 365 again in the Microsoft Teams app store.

How do you restart a Microsoft team?

Specifically intended for Mac users, you can restart Microsoft Teams by following these instruction for resetting the Microsoft Teams app in Mac using the Self Service app: Right Click on the Microsoft Teams Icon in the Dock. Select Quit. Select the MSU Branded Self Service app from the Launch Pad. Enter Teams in the search bar. Select Reset under Reset Microsoft Teams.

What is Microsoft Teams Error caa70004?

Microsoft Team error caa70004, We are sorry, we’ve run into an issue prevents you from logging into Teams and joining the discussion. It is usually caused due to Network issues.

What are the causes for Microsoft Team error caa70004?

Microsoft Team error caa70004 may be caused by some issues such as network problems; caching issues, server issues, and sign-in problems.

Related post: How to fix Microsoft Teams error code 500 on Windows 11.

If when you try to start the Microsoft Teams desktop app on your Windows 11 or Windows 10 computer, but receive the Error code caa70004, then this post is intended to help you with the most adequate solutions to fix the issue. Microsoft Teams is a communication platform developed by Microsoft office; it allows your team to stay organized and have conversations. Although Microsoft Team is an excellent platform for discussion, customers can experience such errors.

When you encounter this issue, you will receive the following error message:

Error code – caa70004
There’s a more permanent way to sign in to Microsoft Teams. If you’re having trouble completing the process, talk to your IT admin.

Why am I getting an error code on Teams?

There could a number of reasons PC users are getting error codes on Teams. It could be you’re not using the right credentials. The Windows Credentials you signed in with are different than your Microsoft 365 credentials. In this case, to resolve the issue, try to sign in again with the correct email/password credentials. If you continue to receive this status code contact your IT admin.

PC users that are faced with Microsoft Teams Error code caa70004 on Windows 11/10 system, can try our recommended solutions below in no particular order and see if that helps to resolve the issue.

1. Run Microsoft Teams with admin privilege
2. Run Teams in Compatibility Mode
3. Enable TLS in Internet Options
4. Disable VPN (if applicable)
5. Clear cache of Microsoft Teams
6. Enable Forms-based Authentication and WS-Trust in your ADFS
7. Use Teams Web version
8. Log out of Microsoft Teams and clear cache
9. Reset the Internet Options
10. Close background programs
11. Add your Office account to the user list.

Let’s take a look at the description of the process involved concerning each of the listed solutions.

1] Run Microsoft Teams with admin privilege

You can begin troubleshooting of this Microsoft Teams Error code caa70004 by running Teams with admin privilege. Try the next solution if this didn’t work for you.

2] Run Teams in Compatibility Mode

This solution requires you to run Teams in compatibility mode and see if that helps. Proceed with the next solution if this wasn’t helpful.

3] Enable TLS in Internet Options

This solution requires you to enable TLS in Internet Options on your Windows 11/10 device. To enable the TLS, follow the steps below.

Type Internet Options in the search bar and select it from the pop-up panel.

Once the Internet Properties interface is open, select the Advanced Settings tab.

Under the Security section, check to see if you have TLS 1.1 enabled and TLS 1.2 enabled; if not, check their checkboxes to enable them.

Select OK to save the changes.

Try to run Microsoft Teams to see if the issue persists.

4] Disable VPN (if applicable)

A VPN client or a Proxy server could trigger this error due to some kind of interference that ends up blocking communications between your Windows 11/10 client machine and Teams cconnection server. In this case, you can try uninstalling your VPN software via the Programs and Features applet on your system or remove any proxy server from your computer and see if that resolves the issue.

5] Clear cache of Microsoft Teams

To clear Microsoft Teams cache on your Windows PC, do the following:

• Quit Teams from the notification area on the taskbar.
• Next, press Windows key + R to invoke the run dialog.
• In the Run dialog box, type or copy and paste the environment variable below and hit Enter:

%AppData%MicrosoftTeamscache

• At the location, press CTRL + A keyboard shortcut to select all the files in the folder.
• Tap DELETE key on you keyboard or right-click the selected contents and select Delete for the context menu.
• Once done, exit File Explorer.

Check if you can start Teams without errors. If the error reappears, try the next solution.

6] Enable Forms-based Authentication and WS-Trust in your ADFS

To enable Forms-based authentication, follow the instructions in this guide Modern authentication failed, Status code 4c7 – Microsoft Teams error. If the issue persists, try the next solution.

7] Use Teams Web version

If at this point nothing seems to work for now, your best workaround is to use the web version of Microsoft Teams at teams.microsoft.com. The web version works and you can be able to run Teams for multiple tenants.

8] Log out of Microsoft Teams and clear cache

The cause of the error may be due to the cache of files of Microsoft Teams, which consists of outdated data. To clear the cache, follow the steps below.

Sign out of your account and ensure that Microsoft Teams is not running in the background.

Press the Win + R key to open the Run dialog box.

In the dialog box, type %App Data%Microsoftteamscache.

This will take you to the folder:

C:Users%yourname%AppDataRoamingMicrosoftteamscache

Delete all files from this folder.

Try to launch Microsoft Teams to see if the error continues.

Related: Fix Microsoft Teams Sign-in Errors and Problems.

9] Reset the internet options

You can fix the issue by trying to reset the Internet Options.

Sign out of your account and ensure that Microsoft Teams is not running in the background.

Then Type Internet Options in the search bar and select it from the pop-up panel.

On the Internet Option interface, click the Advanced tab.

Then, scroll down and click the Reset button.

Close the window and try to launch Microsoft Teams.

10] Close background programs

Apps or programs running in your background might trigger Microsoft Teams causing the error to occur, and the solution is to close the apps. To close the apps, follow the steps below.

Go to Task Manager.

Once the Task Manager interface opens, click the Processes tab.

Then right-click the program you want to close and click End Task from the context menu.

Try to launch Microsoft Teams to see if the error continues.

11]  Add your office account to the user list

Click the Start button and click Settings.

On the Settings interface, click Accounts.

Then click Access Work or School on the left pane.

Click the + Connect button on the right, then log in using your office 365 credentials.

Try to open Microsoft Teams again.

How do I clear MS Teams cache?

For some reason PC users may want to clear the Microsoft Teams cache. To clear the Microsoft Teams cache on Windows 11/10, follow these instructions: Fully quit Microsoft Teams and ensure it’s not still running in the system tray/notification area in the taskbar. Next, navigate to %appdata%/Microsoft/Teams in File Explorer. At the location, select everything in the folder and delete the contents of the folder. Open Teams and wait for it to download required files.

How do I fix Microsoft Team error?

Specifically for IT admin, you can troubleshoot Microsoft Teams integration with customer engagement apps in Dynamics 365, by following these instructions: From the menu select Settings > Services & add-ins. Find Microsoft Teams and then enable External Apps. Set Allow external app in Microsoft Teams to On. Restart Microsoft Teams and then try searching for Dynamics 365 again in the Microsoft Teams app store.

How do you restart a Microsoft team?

Specifically intended for Mac users, you can restart Microsoft Teams by following these instruction for resetting the Microsoft Teams app in Mac using the Self Service app: Right Click on the Microsoft Teams Icon in the Dock. Select Quit. Select the MSU Branded Self Service app from the Launch Pad. Enter Teams in the search bar. Select Reset under Reset Microsoft Teams.

What is Microsoft Teams Error caa70004?

Microsoft Team error caa70004, We are sorry, we’ve run into an issue prevents you from logging into Teams and joining the discussion. It is usually caused due to Network issues.

What are the causes for Microsoft Team error caa70004?

Microsoft Team error caa70004 may be caused by some issues such as network problems; caching issues, server issues, and sign-in problems.

Related post: How to fix Microsoft Teams error code 500 on Windows 11.

A number of my customers experience error code caa70004 when they try to start the Microsoft Teams desktop app. The exact error message reads:

Error code – caa70004
There’s a more permanent way to sign in to Microsoft Teams. If you’re having trouble completing the process, talk to your IT admin.

I have spent a lot of time troubleshooting and resolving this caa70004 error. Causes can be very diverse: network issues (firewall, vpn), caching issues (after changing a password), or computer settings (disabled TLS, compatibility, permissions). Below I have listed all the solutions, starting with the most likely and easiest solution. Try to start Microsoft Teams after each fix. If it is not resolved, continue with the next possible fix.

Fix 1: Run Microsoft Teams once as an administrator

Sometimes, Microsoft Teams needs to make some modifications to your system, before running correctly. To run Teams as administrator:

1. Right-click Microsoft Teams
2. Select Run as administrator
   
3. Logon to Teams with an Office 365 account. Once logged on successfully, sign out and restart Microsoft Teams as usual

Fix 2: Run Teams in Compatibility Mode

Some users have been successful by running Teams in compatibility mode. Follow these steps to set Teams’ compatibility mode to Windows 8:

1. In the Windows 10 start menu, right-click the Microsoft Teams shortcut and select Open file location
   
2. File Explorer opens to the shortcut path. Probably something like C:Users%username%AppDataRoamingMicrosoftWindowsStart MenuPrograms
   Right-click the Microsoft Teams shortcut and select Properties
3. In the Properties window, select the Compatibility tab. Enable the Run this program in Compatibility Mode for checkbox and select Windows 8
   
4. Click OK to save the changes. Next, try to run Microsoft Teams from the Windows 10 start menu to verify error caa70004 is fixed/

Fix 3: Enable TLS in Internet Options

In a rare case, I had a client whose TLS was disabled in Internet Options (!). To verify TLS settings and possibly enable TLS, follow these steps:

1. From the Windows 10 start menu, start typing Internet Options. Open Internet options
   
2. Select the Advanced tab and scroll down to the Security section.
3. Check to see if you have TLS 1.1 enabled, TLS 1.2 enabled (checked).  If not, check the box to enable it.
   
4. Select OK to save the changes.
5. Try to run Microsoft Teams

Fix 4: Disconnect VPN

In case you’re using a VPN connection, make sure to disconnect it. Some VPN and/or firewall configurations block or tamper traffic which may lead to error caa70004 while signing in. Once you are logged on to Teams, it’s ‘safe’ to (re)connect the VPN connection.

It is not viable to list all possible VPN solutions here. Please leave a comment if you are having trouble turning off your VPN connection or firewall, or if you’re running into any issues.

Fix 5: Clear cache of Microsoft Teams

The cache files of Microsoft Teams may very well cause the caa70004 error, especially if you recently changed your password. Clearing the Teams cache is necessary to delete any outdated data:

1. Make sure Teams is not running. Check your system tray (at the right bottom on your taskbar) too, as Teams also runs minimized. If it is running, right-click the Teams icon and select Quit
   
2. Open File Explorer and go to
   %AppData%Microsoftteamscache
   This will take you to a folder like
   C:Users%yourname%AppDataRoamingMicrosoftteamscache
3. Delete all files from this folder
4. Try to start Microsoft Teams to see if error caa70004 is fixed.

Fix 6: Enable Forms-based Authentication and WS-Trust in your ADFS

This solution is very specific and intended for system administrators. But in case all users in a company have sign-in issues, this setting must not be overlooked:

https://social.technet.microsoft.com/wiki/contents/articles/51619.microsoft-teams-login-error-modern-authentication-failed-here-status-code-caa20004.aspx

Workaround for caa70004 error in Teams

If nothing seems to work for now, your best workaround is to use the web version of Microsoft Teams. The web version works surprisingly well. And as a bonus, you’re able to run Teams for multiple tenants. For example, I often need to be online for customer A and customer B. To avoid collaboration issues, I prefer to have dedicated accounts in the customers’ tenant.

Open Microsoft Teams web version from here: https://teams.microsoft.com

If you’re still experiencing problems with Microsoft Teams and error caa70004, please leave a comment! This website is visited thousands of times a day. There is a good chance that I or someone else has an answer to your question.

If I helped you out with this post, please leave a comment too with your experiences! I’d love to read them! And while you’re here, why not take a look at how to improve your Microsoft Teams performance? Microsoft Teams tend to become very sluggish after some weeks with high cpu and memory usage.