On a Windows Server with GUI, you can use the traditional method of setting the display resolution but as there's no Control Panel nor Settings app on Windows Server Core, the only way is through Powershell with the Set-DisplayResolution cmdlet.
Set-DisplayResolution -Width 1024 -Height 768
The cmdlet above sets the resolution to 1024x768. It will prompt you to accept the change, if you don't want that, append -Force parameter.
To get the current display resolution, you can use the Get-DisplayResolution cmdlet.
You can easily trigger SCSI UNMAP in Windows via PowerShell:
Optimize-Volume -DriveLetter C -ReTrim -Verbose
Remote Desktop Manager Mac sometimes has issues with stale cache, especially after an update. Below is a simple one-liner/script I like to use for deleting all the cache files in a Remote Desktop Manager Mac installation.
#!/bin/bash find "$HOME/Library/Application Support/com.devolutions.remotedesktopmanager" -iname "*.mcdf2" -type f -delete