Solved: How do I fix Microsoft Teams sign in error CAA301F7 on Windows 10?

Problem Symptom: Some Microsoft Teams users reported CAA301F7 errors when trying to sign in to their Microsoft Teams account. The detailed error message is as below:

We’re sorry – we’ve run into an issue.
Restart
If that doesn’t work, try signing out and back in.
Error code – caa301f7
There’s a more permanent way to sign in to Microsoft Teams. If you’re having trouble completing the process, talk to your IT admin.

Solved: How do I fix Microsoft Teams sign in error CAA301F7 on Windows 10?

Solved: How do I fix Microsoft Teams sign in error CAA301F7 on Windows 10?

Follow the below solution steps to resolve Microsoft Teams sign in error CAA301F7 on Windows 10.

Content Summary

Potential Causes
Pre-check
Solution 1: Start Microsoft Teams with run as administrator option
Solution 2: Remove Microsoft Teams login credentials information
Solution 3: Delete Microsoft Teams app cache
Solution 4: Turn off Windows Defender Firewall
Solution 5: Enable WS-Trust 1.3 for Desktop Client SSO
Solution 6: Reinstall Microsoft Teams application
Reference

Potential Causes

  • Weak Wi-Fi signal, limited Internet connection, or slow network.
  • App cache interfering with the current Teams session.
  • Blocked by Antivirus or Firewall.
  • Enabling Microsoft Teams in a federated setup with ADFS.

Pre-check

  • Access Microsoft Teams web app through teams.microsoft.com using browser and login with Microsoft account.
  • Ensure you have the stable Internet connection:
    • Perform a speed test to make sure the Internet connection is stable.
    • Restart all network equipment such as router.
    • Switch to a wire connection.
    • If you’re using a Wi-Fi connection, move the laptop closer to the hotspot router.
    • Disconnect the other devices that are connected to the same network to free up more bandwidth.
    • If you can’t improve the Internet connection, you’d have to contact service provider for help.

Solution 1: Start Microsoft Teams with run as administrator option

Step 1: Right-click on the Microsoft Teams desktop icon and click the Properties option from the context menu.

Step 2: Go to the Compatibility tab.

Step 3: Check the option Run this program in compatibility mode for under the Compatibility mode section and select either Windows 8 or Windows 7 from the dropdown menu below it.

Step 4: Check the option Run this program as an administrator under the Settings section.

Start Microsoft Teams with run as administrator option

Step 5: Click on the Apply button then OK button to save the changes.

Step 6: Start Microsoft Teams again.

Solution 2: Remove Microsoft Teams login credentials information

Step 1: Type credential manager in the Windows Search box.

Step 2: Double-click on the first result that appears on the list.

Step 3: Select the Windows Credentials option under Manage your credentials.

Select the Windows Credentials option under Manage your credentials.

Step 4: Expand Microsoft Team to locate the Teams login data.ms-teams-credential-manager.

Step 5: Select all the entries and click on the Remove option to delete the credentials.

Select all the entries and click on the Remove option to delete the credentials.

Step 6: Restart your computer.

Step 7: Start Microsoft Teams again.

Solution 3: Delete Microsoft Teams app cache

Step1: Before clearing the cache, make sure the program exit completely, right-click on the Teams taskbar icon and select Quit to exit the app.

Step 2: Press the Windows + R keys to open the Run dialog box, enter the following path in the Run box and press Enter:

%appdata%\Microsoft\Teams or

C:\Users\user\AppData\Roaming\Microsoft\Teams

open Team cache file path

Step 3: Select all the files and folders, then delete all.

Select all the files and folders, then delete all.

Select all the files and folders, then delete all.

Step 4: Repeat the same steps to remove the cache files inside the folder:

C:\ProgramData\Intel\ShaderCache\Teams_1

Step 5: Close the AppData window.

Step 6: Start Microsoft Teams again.

Solution 4: Turn off Windows Defender Firewall

Step 1: Press Windows + I key to open the Windows Settings.

Step 2: Choose Update & Security.

Step 3: Click on Windows Security from the left pane.

Step 4: Click on Firewall & network protection.

Firewall & network protection

Step 5: Click on Private network and toggle off Windows Defender Firewall section.

Toggle off Windows Defender Firewall for Private network and Public network

Step 6: Perform the same step for the Public network.

Solution 5: Enable WS-Trust 1.3 for Desktop Client SSO

If your users contacted you about Microsoft Teams sign in error CAA301F7 on Windows 10, you need to perform below steps to enable WS-Trust 1.3 for Desktop Client SSO on the on-prem ADFS server.

Step 1: Execute below command on the on-prem ADFS server:

Enable-AdfsEndpoint -TargetAddressPath “/adfs/services/trust/13/windowstransport”

Step 2: Enable both Forms Authentication and Windows Authentication in the Global Authentication Policy under Intranet settings.

Enable both Forms Authentication and Windows Authentication in the Global Authentication Policy under Intranet settings.

Step 3: Request users to restart the computers.

Solution 6: Reinstall Microsoft Teams application

Step 1: Press Windows + S and enter control panel in the Search bar.

Step 2: Select Control Panel from the list of results.

Step 3: Navigate to Programs and Features section.

Step 4: Locate Microsoft Teams and double-click it.

Uninstall Microsoft Teams

Step 5: A Uninstall process confirmation dialogue will now appear. Click on Yes to proceed.

Step 6: Follow the steps above to delete Microsoft Teams app cache.

Step 7: Restart your computer.

Step 8: Download a fresh copy of the Microsoft Teams desktop app.

Step 9: Install the Microsoft Teams desktop app.

Reference