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FIX: Microsoft Teams Error Code 500 (Full Guide)

Microsoft Teams remembers your login credentials. Each time you open the app, it uses those credentials and logs you in automatically so that you’re ready to work. It is by no means an app that can be used without logging in.

Error 500 on Microsoft Teams

The account that you use to log in has to be a Microsoft account. On Windows 10, this can be the same account that you use to sign in to your desktop, or it can be a different one i.e., one given to you by your organization, or the account you used to purchase Office 365.

It’s sometimes this clash between accounts, and sometimes your internet settings that may prevent you from signing in. When you’re unable to sign in, you may see the ‘error 500’ message in Microsoft Teams.

Fix error 500 on Microsoft Teams

To get rid of error 500 and sign in to Microsoft Teams, run through the basic checks we’ve listed and if they do not work, try the solutions listed further below.

Basic checks

  • If you’re using a VPN, turn it off and then try signing into the app.
  • Make sure you have internet access.
  • Power cycle the router.
  • Quit and restart the app.
  • Restart your Windows 10 system.

1. Remove and add sign-in credentials

Apps that can remember login information store it in the Credentials Manager on Windows 10. You can edit the credentials stored to it any time.

  1. Open File Explorer.
  2. Enter the following in the location bar, and tap Enter.
Control Panel\User Accounts\Credential Manager
  1. Select Windows Credentials.
  2. Look for Microsoft Teams or Office 365.
  3. Expand the credentials, and click Remove.
  4. Once the credentials have been removed, open Microsoft Teams.
  5. When prompted to, enter your login information and you will be able to sign in.

2. Clear Microsoft Teams cache files

Deleting the files that Microsoft Teams has in its cache can also fix sign-in problems.

  1. Quit Microsoft Teams.
  2. Open File Explorer.
  3. In the location bar, enter the following and tap Enter.
%AppData%\Microsoft\teams\application cache\cache
  1. Delete all the files in this location.
  2. Repeat steps 2-4 for each of the following locations. Some locations may not exist in which case, you can skip them.
%AppData%\Microsoft\teams\Local Storage
  1. Open Microsoft Teams and try signing in.

3. Uninstall and reinstall Microsoft Teams

Removing and installing Microsoft Teams may fix whatever sign in problems you’re having.

  1. Open File Explorer.
  2. Enter the following in the location bar, and tap Enter.
Control Panel\Programs\Programs and Features
  1. Look for Microsoft Teams. Select it, and click Uninstall.
  2. Allow the app to be removed.
  3. Download and install Microsoft Teams.

4. Reinstall/repair Office 365

Microsoft Teams integrates lots of Office 365 apps and sometimes, a problem with the Office 365 apps leads to sign in problems with Microsoft Teams.

  1. Open File Explorer and paste the following in the location bar. Tap Enter.
Control Panel\Programs\Programs and Features
  1. Look for Microsoft 365, select it, and click the Change button.
  2. Select the Repair option, and allow the installation to be repaired.
  3. If you’re still unable to sign in to Microsoft Teams, return to the same location in Control Panel.
  4. Select Microsoft 365.
  5. Click Uninstall.
  6. Once it has been uninstalled, download and install it again.

5. Ask admin to check the Service Health Dashboard

If your Microsoft Teams account has been given to you bu your organization, it is possible that there is a problem with the account or its settings. Inform the admin of the error, and ask them to visit the Service Health Dashboard. They may see a reason for the error and will be able to help you resolve it.


Microsoft Teams runs into quite a few errors and the cause behind them varies. The sign-in errors are somewhat common, especially if your account is part of an AD.

In such cases, the resolution will normally have to be done at the admin level and not the individual user level. If the above solutions do not work and you’re using a company account in Microsoft Teams, get in touch with your system administrator.

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