6 Ways to Fix Microsoft Teams Error Code CAA20002 [2022] 

Written By Steven Arends

Imagine starting your home office by signing in to your Microsoft Teams account one fine morning, and out of nowhere, it ruins your day by not letting you in and showing the error code caa20002. Sounds familiar? 

As a constant Microsoft Teams user since the pandemic forced us to stay at home, I have faced the error code caa20002 several times now. 

After wasting hours of my time and energy, finally, I found the reasons behind this error and successfully fixed them.


So, What is Microsoft Team’s error code caa20002? 

Microsoft Teams error caa20002 means the MS Teams client can’t connect with the remote server. VPN usage, Teams’ policy, redundant cache files, logging in to multiple devices and locations, complications with syncing MS Teams’ account with Windows can trigger this error.

Read the whole post and don’t skip any part to identify and fix the issues, causing Microsoft teams to display the error code caa20002.

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What causes Microsoft Team Error CAA20002? 

The Microsoft Teams error code caa20002 is caused by VPN usage, incorrect account settings inside the Windows OS, piled-up cache files, and conflicting policy settings of the Team. Sometimes, frequent changes in log-in locations or devices triggered the app to show the error code ca20002.

There are several reasons behind the Microsoft Teams’ error code caa20002. The reasons are mainly related to your device settings or the policy of your MS Team. 

I’ve listed below all the possible reasons behind the error code of MS Teams for your better understandings. Find out the root of your problem among them.

So, the reasons behind Microsoft Teams’ error code caa20002 are: 

VPN Usage 

If you use a VPN for using MS Teams, you’re most likely to face error code caa20002 in MS Teams startup. 

MS Teams requires real-time connectivity with it’s the remote server. Using a VPN delay this connection and interrupts MS Teams’ real-time data exchange with it’s the remote server. That’s why using a VPN Causes the MS Teams to show the error code caa20002 and blocks you from signing in to your account.

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Confliction Between Windows and Microsoft Teams

If the account you’re using for Microsoft Teams is not listed inside the accounts section of Windows on your device, you might face trouble logging in to the MS Teams app because of the error code caa20002. 

MS Teams app syncs your account details from the Windows accounts manager on your pc. If the account is not listed there, MS Teams sometimes recognizes the account as an unauthorized login attempt; that’s why it blocks the log-in process showing the error code caa20002.

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Multiple Device Login 

If you’re logged in to MS Teams on multiple devices and now trying to loin again after logging out previously, the MS Teams app might recognize it as an unauthorized login attempt and show you the error code caa20002. 

No matter how many times you try to log in, you’ll get the error code caa20002.


That’s why logging to MS Teams from more than one device will end in receiving the error code caa20002 on Microsoft Teams app.

Microsoft Teams’ Policy 

If your Team policy obstructs the users from frequently changing login locations, you might receive the error code caa20002. But, if you’ve not changed the login location as you’re working from home, then check if your VPN is active with the auto location setting. 

This might create a misunderstanding between the MS Teams policy and your internet connection, causing you the trouble of MS Teams’ error code caa20002.

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Redundant Cache FIles 

In windows, running an app requires generating cache files to operate it’s processes smoothly. Running the Microsoft Teams app repeatedly without shutting down your device piles up a massive amount of cache files. These cache files conflict with each other and interrupt the background processes of the app. 

This conflict might be the reason behind the error code caa20002 on MS Teams and causes the difficulties of signing in to the Teams app for error code ca20002.

How to Fix Microsoft Teams Error Code CAA20002

So, you might be in a hurry to solve the MS Teams error code caa20002. That’s why I won’t waste your time anymore with technical jibber-jabber. 

But, I suggest you not rush while applying the solutions I’ve listed below to solve the MS Teams error code caa20002. 

Read the solutions carefully to avoid any errors before applying them.

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Here are the methods to fix the Microsoft Teams error code caa20002: 

1. Stop Using VPNs

MS Teams is a real-time business communication platform. The MS Teams app faces interruption while connecting with the remote server through a VPN connection. Because using a VPN delay the connection with it’s the remote server.

So, to avoid inconveniences like MS Team error code caa20002, stop using a VPN. It’ll also save you from the multiple login location issues which cause the same error code. Use a direct connection without a proxy server or a VPN to avoid issues like it. 

2. Change MS Teams’ Password 

In some cases, changing the password of the MS Teams account solves your problem of receiving the error code caa20002. It reinstates your account status as an authorized one in the MS Teams database.


To change the Microsoft Teams account password, follow these steps: 

  • Open a browser on your device.
  • Go to Microsoft’s website and log in. 
  • Sign in using your credential, same as MS Teams. 
  • Go to Security from the navigation bar and submit your password again.
  • Head over to Password and select Change my password.
  • Enter your Current Password, then the new one.
  • Click Save

Now open the MS Teams app on your device, log in using the new password, and see if the error code appears again.

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3. Add MS Teams Account in Windows

So, adding your MS Teams working account in your Windows account manager solves the Microsoft Teams error code caa20002. It authorizes the Microsoft Teams account under the account manager.


  • To add your MS Teams user accounts in Windows 10 Settings, follow these steps:
  • Click on the Windows Start icon on the taskbar.
  • Click on Settings.
  • Go to Accounts and select Access work or school.
  • Look for the account you are using to log in to Microsoft Teams.
  • Click on the add button to add the account. If it’s already there, disconnect it, and then reconnect again.

4. Ask to Change Policy

Changing the Microsoft Teams policy can solve the error code caa20002. If the admins can filter your account from the blocking process for using multiple devices to log in to Team, you will no longer receive the error code on your account. 

Contact the Team admins and ask their help to overcome the error code issue.

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5. Clear MS Teams’ Cache Files

Clearing the cache files of the MS teams app can solve the Microsoft Teams error code 20002. It’ll clear all the previous temporary info about your log-in sessions and will reinitiate the app’s processes.


To clear the cache files of the MS app on your pc, follow the steps below: 

  • Right-click on the taskbar.
  • Click on Task Manager.
  • Search the process of Microsoft Teams and click on it. 
  • Click End task on the lower-right corner of the window. 
  • Press Win+R on your keyboard to open the Run program. 
  • Type %appdata%\Microsoft\teams inside the box and hit Enter key. 
  • Delete the folders named: application cache, blob_storage, Cache, databases, GPUcache, IndexedDB, Local Storage, and tmp

Now, open MS Teams again and check if the error code still appears.

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6. Uninstall & Reinstall MS Teams 

Uninstalling and reinstalling the app can also solve the error code caa20002 on Microsoft Teams.


Follow these steps to uninstall the Microsoft Teams app from your device: 

  • Press Win+R keys on your keyboard to open the Run dialog box. 
  • Type control to open the control panel. 
  • Click on Programs and features.
  • Locate Microsoft Teams and right-click on it. 
  • Click Uninstall. 
  • Confirm by clicking Yes. 
  • Follow the on-screen instructions to uninstall Microsoft Teams from your device and restart your pc. 
  • Open this link on your browser.
  • Click on Download Now. 
  • Open the file and follow the instructions to reinstall it.

Now, open Microsoft Teams again and see if the error still appears.
But before that, go through our epic guide on Microsoft Teams Can’t Change Status from Offline


Why Microsoft team is not working?

Microsoft Teams can’t run properly if you’re using any VPNs or proxy servers on your pc. Also, if it’s not updated in a while, it may perform poorly. Piled-up cache files and conflicting background processes also interrupt running it smoothly.

Why am I having trouble signing in to Microsoft Teams?

If you’ve logged in to Microsoft Teams from multiple devices, it may violate your team’s policy, which results in logging-in difficulties. Also, logging in to MS Teams from multiple locations can violate your team’s policy too. Using a VPN causes this issue and gives you a hard time logging in.

Also, check out our separate post on Airpods Not Working with Microsoft Teams


I’ve mentioned all the complications and issues behind the Microsoft Teams error code caa20002. Follow my guide to point out the problems, and then apply the solutions accordingly.

Comment down below if you’ve any questions or having any troubles applying the solutions. Our experts will try to answer any of your queries right away.

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