The terminal server has exceeded the maximum number of allowed connections

For those who are using Windows Server Remote Desktop Connection, you might found this error during your operation.

Error: The terminal server has exceeded the maximum number of allowed connections

As Windows Server 2003 is using Terminal Services to control the Remote Desktop Connection, your maximum connection is 2 only. However, you got the third connection allowed as admin mode.

mstsc /v:x.x.x.x /admin

If you are using Windows Server 2008, use the admin console mode instead.

mstsc /v:x.x.x.x /console