Most Microsoft Teams users have experienced login error CAA5009D. Here's what you can do to resolve the issue once and for all.

Microsoft is resolving a known issue that causes "couldn't connect" errors when launching the Microsoft Teams desktop and web applications.

Method 3: Uninstall then reinstall the Microsoft Teams app to fix cannot login issue Sometimes this problem can already be caused by a corrupted app file.

Microsoft Teams Error code 503 mainly occurs due to network restrictions or firewall settings. Here's how to troubleshoot this issue.