How to Fix Microsoft Teams CAA50021? 5 Ways

Microsoft Team is a well-known communication and collaboration platform mainly used for business. With the help of Microsoft Teams, you can chat with others and join meetings or share documents online. But sometimes, a Microsoft Teams CAA50021 error code appears when logging in to your Teams Account. This error prevents you from log-in to your account which definitely can be annoying. So, if you are facing the same error, this guide is for you. In this article, we have discussed how to fix the MS Teams CAA50021 error.

How to Fix CAA50021 for Microsoft Teams?

If you are facing the CAA50021 Teams error, the methods below are the best solutions to eliminate this error instantly. Try these methods one by one until you find a solution that helps you solve fix this bug.

1. Disable Antivirus Software for A While

If you have installed a third-party Antivirus on your computer, then this could mean that Antivirus may have recognized Microsoft Team as a threat, and that’s why you won’t be able to access Teams on your computer. The best solution to solve Teams CAA50021 error code is to disable Antivirus software for a while. Follow these steps to do it.

Press Windows + I key on your device to open Windows Settings.

use Windows I key to open Windows setting

Now select Update & Security, click Window Security, and choose Virus & Threat Protection.

Scroll down and select the Manage Settings option under Virus & Threat Protection Settings.

Manage settings option under virus threat protection setting

Disable the Real-Time Protection to disable the Antivirus on your Window for a While.
Now you can try to log in to Teams and see if the problem is fixed.

Antivirus is temporarily disabled from your Windows 10; if you want to enable the Antivirus on your device, then follow the same steps to enable it.

2. Update Microsoft Teams

The outdated version of Microsoft Teams can also cause Teams error CAA50021. If this is the main reason for this error, then the only option for you is to update your Teams app to the latest version. To update the Teams App on Windows, follow the instructions below.

Launch the Teams app on your PC and select the Profile menu from the top right corner.
Now choose the Check for updates option from the drop-down menu.

check for updates in teams to fix teams caa50021

Your App will automatically be updated to the latest version.
Restart the App to apply the latest changes within the App.

3. Delete All the Credentials from Credential Manager

Another method to fix this error from Microsoft Teams is to delete all the Credentials from Credential Manager. Sometimes these credentials can stop you from logging and show the error on the screen. Here is how you can remove all the credentials on Windows.

Exit the Teams App and launch the Windows Control Panel Application.

Launch control panel to fix teams error caa50021

Once you have entered the Control Panel, click on the View By available on the right side and select the Category from the drop-down menu. Then choose the User Accounts option.

User Accounts option on Windows to fix teams error code caa50021

Within User Accounts, you have to choose Credential Manager.

Now select the Windows Credential option.

Navigate down, and all the MS Office-related accounts will appear on your screen; click on the Arrow to Expand account details.
Choose the Remove option at the end to delete all the MS Office Credentials.

Remove MS Accounts to fix caa50021 in microsoft teamsn

In case you have noticed more MS accounts, then delete them one by one
Once you have deleted all the accounts, go to Teams App, re-enter your credentials, and try logging in. Hopefully, this time you don’t have to face the error.

4. Run the Dsregcmd Command

The error can also appear if your device registration to Azure is expired. If that is the case, then to solve this error, you have to re-register your device with Azure. Many Azure AD users have confirmed that running the Dsregcmd has helped them in removing the error. Follow the instruction below to fix this issue.

Press Window + R to open the Run on your PC

Now Type cmd and then click on OK to open the Command Prompt

Type dsregcmd/leave in the Command Prompt and then press Enter.
You will also need to remove the MS-Organization-Access and MS-Organization-P2P-Access entries from the Certificate Store.
Type dsregcmd/status in the prompt and press Enter.
Check if AzureAdJoined is selected to NO.

Now go to the Window Search box and type Task Scheduler, then launch it.
Open the Task Scheduler Library and then select Microsoft.

Choose the Window option and open Workplace Join.

Then right-click on the Automatic-Device-Join and select the Enable option.

5. Disconnect The Account in Access Work or School

If none of the above methods have helped you solve Teams error code CAA50021, then it is possible to solve this error by disconnecting the Account in Access Work or School. Most people mentioned that disconnecting the Work or School accounts has helped in fixing this issue. Here is a step-by-step guide to disconnecting your Work Access or School account.

Launch the Settings Application on your computer and then click on Accounts.

Click on the Access Work or School option. You can find it below the Sign-in option.
Now delete all the accounts available on the screen by clicking on Disconnect.

Navigate back to the Microsoft Teams App and log in to your Account again.

Hopefully, this method will help you solve MS Teams error code CAA50021 and helps you get back into Microsoft Teams. We know that it is important for you to access Teams as soon as possible. That’s why we have mentioned the top solutions to solve this issue quickly.

Final Words

All the Solutions mentioned above to solve Microsoft Team CAA50021 Error are workable. When you have experienced this error on your device, you can try these solutions one-by-one until you have found the solution that has been able to fix this error. If all these methods fail to solve your issue, then we might think that the reason causing this issue is not within the Microsoft Team app. Try to restart your Windows and then re-launch the App to see if the error still appears on your device.