If you are looking for effective solutions to the Microsoft Teams error code CAA50021, this post is worth reading. In this post, MiniTool introduces how to get rid of this error in detail. Simply follow it to solve your problem.

Microsoft Teams is a popular chat-based collaboration platform that is mainly used for business. With this program, you are able to chat with others, join a meeting, share documents online, etc. Unfortunately, sometimes when you are trying to access Microsoft Teams, you may fail and receive the CAA50021 error code.

The Microsoft error code CAA50021 can be caused by various reasons. Once it occurs, you should take actions to fix it. Here’re several solutions you can try.

Solution 1: Temporarily Disable Antivirus

The third-party antivirus software installed on your PC and Windows Defender Firewall may recognize Microsoft Teams as a threat and stop you from accessing it. As a result, you will see the error CAA50021 appear on your screen. To bypass this error, you can temporarily disable the antivirus.

Solution 2: Re-register Your Device with Azure

The Microsoft error code CAA50021 may also happen if your device registration to Azure is expired. In this case, you should solve this error by re-registering your device with Azure. Here’s a step-by-step guide.


Note: You can only execute this method with an administrator account.

Step 1: Press Windows + R to open the Run dialog.

Step 2: Type cmd in the text box and then press Enter to open Command Prompt.

Step 3: In the Command Prompt window, type dsregcmd /leave and press Enter.

Step 4: Search for Manage user certificates in the search bar and open it from Best match. Then navigate to Current User\Personal\Certificates and make sure the MS-Organization-Access and MS-Organization-P2P-Access entries are deleted.

Step 5: Go back to Command Prompt and type dsregcmd /status. Then press Enter to check if the status of AzureAdJoined is set to No.

Check Device state

Step 6: After that, open Task Scheduler and then navigate to Task Scheduler Library > Microsoft > Windows > Workplace join. You should now right-click Automatic-Device-Join in the middle section and select Enable.

Enable Automatic-Device-Join

It’s also possible to fix the CAA50021 error code by linking your device to a work or school account. To do this, follow the steps below.

Step 1: Open Windows Settings by pressing the Windows and I keys. Then select Accounts.

Step 2: Go to Access work or school and then click Connect from the right side. Follow the on-screen instructions to finish linking your device to Azure.

Solution 4: Remove the Microsoft Teams Credentials

Another way you can try to fix the error CAA50021 is to delete the credentials related to Microsoft Teams.

Step 1: Open Control Panel and go to User Accounts > Manage Windows Credentials.

Select Manage Windows Credentials

Step 2: In the next window, scroll down to find all the credentials associated with Microsoft Teams. Then expand them and click Remove to delete them one by one.

Step 3: After you delete all the Microsoft Teams credentials, restart your computer to see if the error is resolved.

Solution 5: Update Microsoft Teams

The outdated Microsoft Teams app may lead to the error code CAA50021 as well. On this occasion, you can try to fix this error by updating Microsoft Teams to the newest version. To complete the update, you need to select the Settings and more menu at the top-right corner of Teams. Then select Check for updates.

Further reading:

If you want to manage the partitions and disks on your PC effectively, we’d like to recommend MiniTool Partition Wizard to you. It’s a professional partition/disk manager including a wide range of features. With this program, you can create/format/resize/delete partitions, copy/wipe disks, convert disks to MBR/GPT, etc.

If you are interested in this wonderful partition managing tool, you can simply click the button below to install it on your Windows PC and have a try.

MiniTool Partition Wizard DemoClick to Download100%Clean & Safe

All the above solutions are feasible. When you are experiencing the Microsoft error code CAA50021, you can try them one by one until you fix this error. If you have any other excellent solutions to this error, you can share them with us in the following comment part. We’ll appreciate you a lot.

  • linkedin
  • reddit