Hello Ralf Rottmann,
Thank you for posting in Microsoft Community forum.
I'm sorry to hear that you're experiencing this issue. Here are a few possible solutions:
- Try disabling the "Use all my monitors for the remote session" option in the Microsoft Remote Desktop settings. This may help resolve the issue with the lock screen.
2.Try disabling the "Windows Hello" feature in the Sign-in options. This can sometimes cause issues with the lock screen as well.
- Check if the "Interactive logon: Do not display last user name" policy is enabled on the Windows 11 Pro machine. If it is enabled, try disabling it and see if the lock screen issue is resolved.
- Try updating the Remote Desktop client on your macOS machine to the latest version. This may help resolve any compatibility issues with Windows 11 Pro.
I hope the information above is helpful.
If you have any question or concern, please feel free to let us know.
Best Regards,
Haijian Shan