Hello @Kristin Doherty ,
Thanks for your query.
1.What's the exact error message?
2.What about other version of RD Client?
3.There's a similar issue described in below post: https://learn.microsoft.com/en-us/answers/questions/99179/remote-desktop-for-ios-14-quit-error.html
If not solved, you could post this issue to the uservoice and let others vote for it to see if there will be any feedback from the product team.
https://remotedesktop.uservoice.com/forums/925639-remote-desktop-beta-client-for-ios
You may also open a case to Microsoft for further professional help.
https://support.microsoft.com/en-us/help/4341255/support-for-busines
Best regards,
Leila
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