Please refer to the following steps to enable multiple remote connections on windows server 2012:
1. Login to the windows server 2012 via. RDP
2. Open command prompt. Type gpedit.msc and open Local Group Policy Editor.
3. Go to computer configuration --> Administrative Tempalates --> Wondows Components --> Remote Desktop services --> Remote Desktop Session Host --> Connections.
4. Search for "Restrict Remote Desktop Services users to a single Remote Desktop Services session"
5. Right click on it and click Edit.
6. Select the option of "Disabled", apply and click Ok.
7. Go to the command prompt and type "gpupate" and enter.
It will update the policy and following will be the result:
Computer Policy update has completed successfully.
User Policy update has completed successfully.
Windows Server 2008:
You need to follow the below steps on a Windows 2008 server in order to enable multiple remote connections :
1. Go to Start --> Run
2. Type in tsconfig.msc
3. Click OK
4. Un-check the box which says, "Restrict each user to a single session". 5. Click OK