Fix Microsoft Teams Error Code CAA70004 in Windows [2024]

Written By Steven Arends

Microsoft’s Google Meet rival aka Teams is loved by numerous users around the globe but recently, we’ve received complaints about how user’s Teams Desktop app has run into an issue and displaying a CAA70004 error message.


This is not a simple bug and is not going to fix itself over time if you leave it untouched. Keeping that in mind, I’ve accumulated an all-in-one list of all the tested solutions to troubleshoot and fix this issue once and for all.

Stay with me through the post to identify and fix the issues behind Microsoft Teams’ error code caa70004.

What causes Microsoft Team Error CAA70004? 

The MS Teams error code caa70004 is mainly caused by disabled TLS settings in network options, missing ADAL and Live ID packages. Also, changing Microsoft account credentials, VPN usage, junk cache files, and several active sessions of the app trigger the error code ca70004 in MS Teams.

So, What is error caa70004?

Error caa70004 refers to the inability of the app to sign you into it’s server. Stacked up cache files, MS Teams background process interruption, logging in to multiple devices, using a VPN, and changing the MS Teams account credentials cause this error.

I’ve found several reasons behind the Teams error code. They are mainly related to your device’s internet settings and internal package libraries.

You’ll find all the possible reasons behind the error code of MS Teams below in my listing. Find your nub of the issue among them.

Do check our latest post on How to Change Your Background on Microsoft Teams.

Here are the causes for the CAA70004 in Microsoft Teams:

VPN Usage 

So, if you are using a VPN to log into MS Teams, that’s maybe the root of the error in MS Teams. 

MS Teams requires real-time connectivity with it’s server to fetch the information of your account. Using VPN delays this connection and interrupts the real-time data exchange between your MS Teams client and the server. That’s why using a VPN triggers the error and blocks you from signing in to your MS Teams account.

Interruption in Teams’ Background Process 

If teams cannot run it’s background processes smoothly in your device and is forced to shut down some of it’s processes, it results in the error. 

A business communication platform like MS Teams requires various processes running in the background to keep every option available at hand. But, if it’s forced to shut some processes down by other apps and your ram optimizer, then it malfunctions and gives you the error.

Check out our expert-recommended error fixing, MS Teams Error Code 42B.

Unlisted Teams Account in Windows

If your Teams account is not listed in the Windows account manager, you might face the MS Teams error. 

MS Teams and Windows accounts manager syncs information on your pc. If the syncing process is interrupted, it blocks your account from logging in to the app and shows the error code.

Corrupted or Missing Windows Packages 

Teams needs additional packages installed inside Windows to run it’s operations smoothly. But if these packages get corrupted or aren’t installed on your pc in the first place, you’ll get the error. 

Active Directory Authentication Library (ADAL) and Live ID are these types of libraries. ADAL is a tool in the Microsoft .NET framework. It lets client application developers authenticate users to an Active Directory deployment or the cloud. And Windows Live ID is the identity and authentication platform for all Microsoft online services. 

So, both of these platforms are crucial for running a web-based application like Microsoft Teams. Any complications in them directly affect the app showing the error code caa70004.

Follow our guide to Fix Microsoft Teams Error Code CAA5004B.

Multiple Active Session of the Teams App 

Multiple active sessions can lead to network issues or server issues which prevents you from logging in to Teams.

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

Junk Cache FIles 

In windows, every app creates temporary cache files to operate it’s processes. Running the Teams app repeatedly also piles up a massive amount of cache files. After you change your credentials, like the password, the previous cache files become obsolete and interrupt the background processes of the app. 

This conflict might be the reason behind the error caa70004 on MS Teams and causes the difficulties of signing in to the app.

How to Fix Microsoft Teams Error Code CAA70004?

Alright, I won’t waste your time with technical jibber-jabber and delay your way to the solutions for fixing Teams error caa70004. I want to help to get you back on your track.

But, I suggest you take things slowly while applying the solutions I’ve listed below to solve the error code. 

Read carefully before applying them to avoid any complications.

So, the methods for solving the Microsoft Teams error code caa70004 are: 

1. Stop Using VPNs

Teams is a real-time business communication platform. It’s a connection with the remote server gets interrupted while going through a VPN because it delays the connection.

So, to avoid inconveniences like MS Team error, stop using a VPN. It’ll also help you avoid other error codes in the Teams app. Use a direct connection without a proxy server or a VPN to avoid issues like it.

2. Run Teams as Administrator

Sometimes the Teams app struggles to run at startup, and some processes might get blocked by the system optimizer. So, if Teams is not running as Administrator the CAA70004 may show up.

Follow these steps to run the Discord app as an administrator: 

  • Right-click on the taskbar and select Task Manager.
  • Select processes of Microsoft Teams and click End
  • Right-click on the Microsoft Teams shortcut and select Run as

Now Teams can run it’s processes under administrator privileges and solve the error.

Go through our epic guide on Microsoft Teams Can’t Change Status from Offline.

3. Add MS Teams Account in Windows

So, adding your MS Teams working account in your Windows account manager solves the error caa70004. 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. Run the MS Teams App in Compatibility Mode

If you run the Microsoft 365 app in Windows compatibility mode, it’ll fix the app’s compatibility issues and caching issues.


Here are the steps to run the Microsoft Teams app in Windows compatibility mode:

  • Click the Windows start button on your keyboard.
  • Scroll down to Microsoft Teams.
  • Right-click on it and select Open file location.
  • Right-click the Microsoft Teams shortcut icon and select Properties.
  • Go to the Compatibility tab, put a checkmark on Run this program in the Compatibility Mode checkbox, and choose Windows 8.
  • Click OK to save the changes. 

Now, rerun Microsoft Teams and see if it resolves the issue.

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

5. Clear Teams Cache Files

Clearing the cache files of the MS teams app after you change your Microsoft account password can solve the error code 70004. 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
  • Press Win+R on your keyboard to open the Run program.
  • Type %appdata%\Microsoft\teams\cache inside the box and hit Enter key.
  • Delete every folder in the file explorer window of the directory.delete-teams-cache-folder-from-appdata
  • Restart your pc.

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

6. Install Corrupt and Missing Libraries

So, I told you before that Microsoft Teams needs specific platforms like ADAL and Live ID to perform without any errors and complications. And if these platforms are missing or corrupted on your device, you’ll receive error code caa70004 if you try to sign in to MS Teams app. 

Reinstalling these packages fix the issue. 

Here are the steps to install ADAL and Live ID packages: 

  • Click on the Search icon on the taskbar.
  • Type PowerShell and right-click on it.
  • Click Run as administrator.
  • Type the command below to reinstall the ADAL if you’re using your work account for MS Teams: 

if (-not (Get-AppxPackage Microsoft.AAD.BrokerPlugin)) { Add-AppxPackage -Register “$env:windir\SystemApps\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy\Appxmanifest.xml” -DisableDevelopmentMode -ForceApplicationShutdown } Get-AppxPackage Microsoft.AAD.BrokerPlugin

  • Type the following command to reinstall the Live ID package if you’re using a personal account for Microsoft Teams: 

if (-not (Get-AppxPackage Microsoft.Windows.CloudExperienceHost)) { Add-AppxPackage -Register “$env:windir\SystemApps\Microsoft.Windows.CloudExperienceHost_cw5n1h2txyewy\Appxmanifest.xml” -DisableDevelopmentMode -ForceApplicationShutdown } Get-AppxPackage Microsoft.Windows.CloudExperienceHost

  • Wait till the package installation process finishes.
  • Restart your pc once the installation is done. 

Now, run the Teams app and see if the error code is fixed.

7. Enable TLS Option in Internet Settings

Inside Windows internet and firewall settings, enabling TLS provides secure communication of the user apps through the internet. If it’s disabled, it might result in the error code caa70004. Enabling it in the internet setting will solve the problem.

ms-teams-tlsHere are the steps to enable TLS in the internet settings: 

  • Click on the Search icon on the Taskbar.
  • Type Internet options and hit Enter.
  • Click on Internet options and go to the Advanced tab.
  • Expand the Security section.
  • Click the check-boxes to enable TLS 1.1 and TLS 1.2
  • Click OK and close the window.

Restart Microsoft Teams app after the process finishes and check if the error is fixed. As an alternative method, you can also reset Internet settings to achieve the same effect.

8. Uninstall and Reinstall MS Teams 

Uninstalling and reinstalling the app can also solve the error code caa70004 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. I suggest using the web version of Microsoft Teams, but keep in mind, that it doesn’t support as many features as the Microsoft Teams desktop app.


Why can’t I use the Microsoft team?

You can’t use Microsoft Teams if you’re using any VPNs or proxy servers on your pc. Piled-up cache files and conflicting background processes will interrupt running its background processes and keep you from using it. Also, if it’s not updated in a while, it may be obsolete.

Why do Microsoft Teams keep saying sign-in errors?

If you’re using the wrong credentials for signing in to Microsoft Teams, you’ll face logging-in difficulties. Also, not clearing the Teams app’s cache after changing your Microsoft password will give you trouble signing in. Using a VPN will give you a hard time logging in.


So, let’s wrap things up, hoping that you’ve underwood all the complications and issues behind the Microsoft Teams error code caa70004 I’ve mentioned earlier. 

Don’t worry if you have any confusion!

Write down your questions in the comment section below if you have one. Our experts will try to answer any of your queries right away.

About The Author
Steven Arends is a computer science graduate and tech enthusiast with over 10 years of experience in the field. He has a vast collection of computer hardware and loves exploring the latest advancements. As a contributing author to 10Scopes, Steven shares his expertise to make the world of technology more accessible and easier to understand for all readers.

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