I'm using Microsoft's Remote Desktop Connection Manager on Windows 7 x64 Ultimate. I have several groups of servers, all under a single parent, sharing domain credentials.
Some of my groups can be logged off as a group, using the option "Log off group". But, one of my newer groups cannot be logged off as a group. I have some servers that cannot even be logged off individually from the "Log off server" option. I have to use the Logoff command from inside the guest.
Unable to log off from <group>
Reason: Unable to enumerate remote sessions