Possible fix (works but for how long) Outlook 2016 on RDS 2019 Gives Error 'Cannot start Microsoft Outlook. The set of folders cannot be opened'

 

Outlook 2016 on RDS 2019 Gives Error 'Cannot start Microsoft Outlook. The set of folders cannot be opened'

On the problem computer, create the registry key for the affected user: Computer\HKEY_USERS\USERSID\Software\Microsoft\Office\16.0\Outlook\AutoDiscover

Name: ExcludeScpLookup
Type: REG_DWORD
Data:1

Rename the Outlook Folder c:\users%username%\AppData\Local\Microsoft\Outlook

Delete profile keys from Computer\HKEY_USERS\USERSID\Software\Microsoft\Office\16.0\Outlook\Profiles

Reverse block of Windows 10 upgrade to Windows 11

On a PC that has been blocked from upgrading to Windows 11 you will see registry keys as below with similar values.

To unblock the upgrade, you need to delete TargetReleaseVersion, leave ProductVersion as it is.

Untested: I don't think the TargetReleaseVersionInfo value matters once TargetReleaseVersion is disabled.