[SOLVED] Microsoft Teams Error Code CAA20002

Are you facing the error code caa20002 problem while signing in to the Microsoft Teams app? Then don’t worry. In this post, we will show you how to fix the Microsoft Teams’ error code caa20002 problem pretty easily.

When several users attempt to log in to Microsoft Teams using their account or a separate user account, they are unable to do so and instead get an error message with the code CAA20002. This problem has been reported by several people.


It’s possible that the cache files are to blame for this, but there might be other factors at play as well. If you are also experiencing this difficulty, then the potential remedies that are outlined in the article that is located below may be of assistance to you.

So, keep reading this post until the end to learn more in detail.

Causes of Microsoft Teams Error Code CAA20002

Eventually, after spending a significant amount of my time and effort over the course of many hours, I was able to identify the causes of these errors.

But before that, what precisely is the meaning of the error code caa20002 generated by the Microsoft Team?

Error code CAA20002 from Microsoft Teams indicates that the client application for Microsoft Teams is unable to establish a connection with the remote server.

This problem may be caused by the use of a virtual private network (VPN), the policy of Microsoft Teams, duplicated cache files, logging in from various devices and places, or difficulties synchronizing Microsoft Teams’ accounts with Windows.

Now, as we all know, there are a few different causes for the error code caa20002 that occurs in Microsoft Teams. The primary causes are associated with the configurations of your device or the policies of your MS Team.

In order to assist you in further comprehending the situation, We have provided the following list, which contains all of the potential causes of the error code generated by MS Teams. Determine which one of these is the source of your issue and fix it.

Therefore, the following are the causes of the error code caa20002 caused by Microsoft Teams:

For Using VPN

If you connect to Microsoft Teams over a virtual private network (VPN), you will almost certainly see the error code caa20002 during the starting process for Microsoft Teams.

MS Teams need a connection on a real-time basis with the remote server in order to function properly. The use of a virtual private network (VPN) may cause a delay in this connectivity and will disrupt the real-time data transmission that MS Teams does with its distant server.

Because of this, utilizing a virtual private network (VPN) will result in the Microsoft Teams application giving you an error message with the code caa20002 and will prevent you from logging in to your account.

Windows Account and MS Teams Are Different

You can have issues signing in to the Microsoft Teams app due to the error number caa20002 if the account you use for Microsoft Teams is not registered inside the accounts area of Windows on your device.

The account information is synchronized from the Windows accounts manager on your own computer to the MS Teams app. MS Teams may occasionally detect an account as an illegal login attempt if the account is not mentioned there.

Because of this, MS Teams will prevent the account from logging in and will display the error number caa20002.

Logged In in Several Devices

If you are currently signed in to Microsoft Teams on numerous devices and attempt to enter in again after having already logged out, the Microsoft Teams app may detect this as an illegal login attempt and provide you with the error number caa20002.

You will continue to receive the error code caa20002 regardless of how many times you attempt to log in.

Since this is the case, login into MS Teams from more than one device will result in the Microsoft Teams app displaying the error number caa20002.

MS Teams Policy Violation

It’s possible that you’ll get the error number caa20002 if the policy for your Team prevents users from regularly changing where they log in. Whether you are working from home but have not switched the login location, check to see if your VPN is functioning with the auto location option enabled.

Because of this, there is a possibility that a mismatch may arise between the policy of Microsoft Teams and your internet connection, which will result in the occurrence of error code caa20002 for Microsoft Teams.

Conflicting Cache Files

When using Windows, it is necessary to generate cache files for an application before it can be started so that its processes can function smoothly. When you use the Microsoft Teams app on your smartphone frequently without giving it a chance to shut down, a significant number of cached data will be created. These cache files are incompatible with one another, which causes a conflict that disrupts the app’s background activities.

It is possible that this disagreement is the origin of the problem code caa20002 on MS Teams, which in turn creates issues in signing in to the Teams app with the error number ca20002.

How to Fix Microsoft Teams Error Code CAA20002

It is simple to fix the error code CAA20002, which occurs when there is a problem with your account. As this error is caused by account-related difficulties.

Therefore, let’s put a stop to this idle chatter and start looking into the solution. Let’s begin with solutions that need the least amount of effort on your part and make our way up to more involved approaches as we try to address the problem.

The following are some potential methods that might assist you in repairing your Microsoft Teams account after receiving the CAA20002 error code:

1. Turn Off VPN

First, you will have to turn off the VPN service. MS Teams is a platform for real-time corporate collaboration that is provided by Microsoft. Whenever the Microsoft Teams app attempts to establish a connection with a distant server via a virtual private network (VPN), the connection is often disrupted. Simply because using a Virtual Private Network will create a lag in the connectivity with the distant server.

Stop utilizing a virtual private network (VPN) since this will allow you to prevent annoyances such as the MS Team error number caa20002. It will also prevent you from having problems with numerous login locations, which are the root cause of a similar error code.

If you want to prevent problems like this one, you should use a direct connection instead of a proxy server or a virtual private network (VPN).

2. Delete Microsoft Teams Cache Files

If this issue is happening due to the cached files of Microsoft Teams, then removing every one of those cached files from Teams could be beneficial in getting rid of this code CAA20002 issue. Before you proceed with that, make sure that the Microsoft Teams application on your Windows 11 or Windows 10 machine is entirely closed.

This will guarantee that the Microsoft Teams program is not operating in the background. After that, remove the cache by following these instructions for Microsoft Teams:

  • Click the right mouse button on the Taskbar.
  • Select Task Manager from the menu.
  • Conduct a search for the Microsoft Teams process, and then click on it.
  • Click on the End Task button on the upper sanction if you are a Windows 11 insider preview user, or you can find the End Task button in the below right side corner.


  • To launch the Run application, press the Win + R key simultaneously on your keyboard.
  • In the box, type %appdata%\Microsoft\teams, and then click the Enter key on your keyboard.
  • Delete the folders that have the following names: application cache, blob_storage, Cache, databases, GPUcache, IndexedDB, Local Storage, and tmp.


Launch Microsoft Teams once again and check to see whether the problem code is still there.

3. Change Your Associated Microsoft Teams Account Password

Changing the password of the Microsoft account that is linked to your Teams account can also be helpful in resolving this issue, as doing so will cause all of the earlier logged-in devices to be removed from the system. This is because the issue can also arise as a result of multiple device logins from various locations.

The following actions need to be taken in order to change the password for your account on Microsoft Teams:

  • Launch a web browser on the device you’re using.
  • Visit the official website of Microsoft and sign in Which is: https://account.microsoft.com/
  • Sign in using the credentials you normally use for Microsoft Teams.
  • You will need to re-enter your password after going to the Security section using the navigation bar.
  • Navigate to the Password menu, and then pick the Change my password


  • First, enter the password you’re currently using, then the new one.
  • Select the Save

Finally, launch the Microsoft Teams app on your smartphone, sign in using the updated password, and check to see whether the error code is being shown again.

4. Uninstall & Reinstall MS Teams

No matter what the problems might be, uninstalling and reinstalling the app always fixes the issue (in most cases). If up to this point, nothing really has helped, it is time to try something more drastic. Pull out the heavy guns. Uninstalling Teams from your Windows device and then reinstalling it will undoubtedly resolve the problem for you. This is a guarantee.

To remove the Microsoft Teams application from your computer, you will need to follow the given steps:

  • Press the Win + I button on your keyboard to open the Settings Alternatively, you can click the Start menu and go to Settings.
  • Navigate to the Apps > Installed Apps.
  • Search for Microsoft Teams and click on the three-dot button on the right side.
  • Now uninstall it by selecting the Uninstall


Now, launch Microsoft Teams once again, and check to see whether the error code caa20002 still manifests itself.

5. Use the Web Version of Microsoft Teams

It is not a straightforward method to solve this problem, although it is beneficial if you wish to log in with that specific account on Microsoft Teams for whom you are experiencing this difficulty. In other words, this approach is not a solution.

Accessing the web version of Microsoft Teams (https://teams.microsoft.com/) using whatever browser that you like, enter the login information for your Microsoft Teams account, and getting to work are the steps that need to be taken.



The error code caa20002 is a pretty common issue for regular Microsoft Teams users. So, after doing some intense research, we rounded up some of the best possible ways to fix this issue. We hope this guide has helped you to know how to fix the Microsoft Teams’ error code CAA20002 problem easily.