Hi Simon,

”If we use c:\lianja\cloudserver\tenants\public\appcenter\log in.rsp (or login_rdp.rsp) as the target then windows server 2019 just complains that it doesn't know what to do with the filetype.”

That is nonsensical for a shortcut target which must be either an executable or a file type that is associated to an exe e.g pdf, doc etc.

If the data is read only it’s a directory permissions restriction issue when RDP is being used. Look at the permissions on the Lianja data folders and determine what is needed for a user logged in as rdp.