When opening a remote desktop session, there are times when its stuck in a "Please Wait" state.
The workaround for this is the following -
- Open Powershell in Administrator mode
- Run the following query - "query user /server:[server_name]"
- Take note of the sessionname
- Run the following query - "reset session [session_name] /server:[server_name]"
This should reset the session and allow logging into the server via remote desktop.