The server is a shared virtual server slice running Windows Server 2019. [Set up by InterServer - I'm the software developer of the customer.]
A remote Windows 10 computer in location A usually connects to the server via RDP without problems, but occasionally [was every few weeks, months ago, but for the last several weeks it is at least once per week] it starts failing to connect for an hour or so.
The messages seen include:
- "Please wait for the Local Session Manager" [forever, and sometimes
after having been connected for some minutes]