Occasionally, there is a need to establish multiple simultaneous Remote Desktop sessions using the same RDP (Remote Desktop Protocol) user.
For example, you may require two concurrent Remote Desktop connections for the Administrator user. This can be accomplished by configuring the Terminal Server settings within the Windows Registry Editor.
Here is a step-by-step guide to making the necessary registry changes to enable multiple RDP sessions for a single user:
1. Log in to your server via Remote Desktop. Please refer to how to connect VPS using RDP for more details.
2. To open the Registry Editor on Windows Server 2008 R2, click the Start button, then select Run. In the Run menu, type regedit and press Enter.
To access the Registry Editor on Windows Server 2012 R2, press the Windows key and the letter "R" simultaneously to open the Run dialog. In the Run menu, type regedit and press Enter.
3. Once the Registry Editor window is launched, navigate to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\TerminalServer.
4. By selecting the Terminal Server registry, you will see the registry key fSingleSessionPerUser on the right panel.
5. Right-click on the fSingleSessionPerUser key and then click on Modify. 
6. Change the key value from 1 to 0, as shown in the following screen, and close the Registry Editor. The value 1 denotes a single session for each remote desktop user, and 0 denotes multiple sessions for each user.
Note that if the fSingleSessionPerUser key is unavailable, you will need to create it manually. To add a new key, click on Terminal Server >> New >> New DWORD (32) Value. Name this key as fSingleSessionPerUser, set its value to 0, and close the Registry Editor.
That's all.
