Teams no longer autostarts and asks for login

Hello MTU42 

Welcome to the Microsoft community, my name is Recep I'll be happy to help you today.

Please follow the below steps to resolve your issue

Check Teams Autostart Settings:

• Open Microsoft Teams.
• Click on your profile picture in the top right corner.
• Select "Settings."
• In the "General" section, ensure the "Auto-start application" option is enabled.

Verify Registry Settings:

• Open the Registry Editor (regedit).
• Navigate to HKEY_CURRENT_USER\Software\Microsoft\Office\Teams\LoggedInOnce.
• Ensure the LoggedInOnce value is set to 1.

Repair Teams Installation:

• Open the Control Panel.
• Go to "Programs" > "Programs and Features."
• Find "Microsoft Teams" in the list, right-click, and select "Change."
• Choose the "Repair" option and follow the prompts.

Check Group Policy:

• If your organization uses Group Policy, verify the Teams-related Group Policy settings.
• Look for policies related to autostart and authentication.

Intune Configuration Check:

• In the Intune portal, review the configuration profile for Microsoft Teams.
• Ensure there are no conflicting policies that may prevent autostart.

Azure AD Connection:

• Confirm that the Azure AD account is still properly connected.
• Check for any Conditional Access policies that might affect Teams autostart.

Make sure your teams application is up-to-date