I am only able to open, and view thumbnails, for a maximum of 6 RDP sessions on my Server 2012 box at a time in Remote Desktop Connection Manager (RDCM). If I add more sessions I just get a variety of connection errors for the additional sessions. If I activate
a 7th session one of the existing 6 sessions goes off-line with a connection error message. Sometimes the error says 3334, sometimes the error says 0x8345000E, and sometimes it just says there is a connection error.
I have checked Group Policy on the server to ensure I don't have any settings restricting the number of RDP sessions.
In fact, I will often have 30 or 40 RDP simultaneous sessions opened, I am just not able to view them all in RDCM. I have seen reviews of RDCM with screenshots showing dozens of thumbnails so it seems to be something that's possible to do.
Are there any settings I should make on the server to allow RDCM to connect to more than 6 simultaneous RDP sessions?
Just to be clear, all these RDP sessions are running on the same server. Also, I am just using the trial license for Server 2012 and Remote Desktop Services right now. I don't think that should have an impact, but I wanted to be thorough.