Staring Windows Server 2008, you cannot log in to Windows server via remote desktop using same user account. If you log in with the same user account, the first session would be terminated. This would be big challenge in an environments where there is more than one admin and trying to use same log in to connect via remote desktop.
Please do make a backup of the registry key before you make any changes as changes to the registry are reflected immediately.
- Go to Start > Run > regedit
- Find the registry key: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\TerminalServer
- Double click the fSingleSessionPerUser value to edit
- If the does not exist, right click and create a new DWORD and enter fSingleSessionPerUser under Value name.
0 Allows multiple sessions per user
1 Force each user to a single session
- Click OK and exit.