A few versions of MSRDC back we started to have issue with annoying pop-up Microsoft login prompt after logout from WVD RDP session.
I have noticed the MSRDC do the workspace feed refresh automatically after a period. I guess the issue could be caused by MFA policy which require to re-confirm MFA prompt each hour and if the last workspace feed refresh was unsuccessfully, the client will show the Microsoft login prompt after WVD logout automatically.
We did not make any changes in MFA policy - we have only installed the MSRDC updates continuously.
Do you know if the auto-refresh function in MSRDC could be disabled by some config, registry, etc.?