When you try to create remote desktop sessions by using the original local administrator account or the domain administrator account in Windows Server 2008, in Windows Server 2008 R2, or in Windows 7, you receive the following error message:
The remote session was disconnected because another user has connected to the session.
This problem occurs when Autologon (that is, the "single session per user" policy) is enabled.
For example, you log on as the local administrator when Autologon is enabled. When you create a remote connection to the computer by using the local administrator’s credentials, the existing glass session appears for several seconds, and then the session is disconnected.
Note Other members of the Administrators group may not experience this issue.