How to Enable Multiple Remote Desktop Sessions on Servers

[basit]

To configure the number of simultaneous remote connections allowed for a connection

On the RD Session Host server, open Remote Desktop Session Host Configuration. To open Remote Desktop Session Host Configuration, click Start, point to Administrative Tools, point to Remote Desktop Services, and then click Remote Desktop Session Host Configuration.
Under Connections, right-click the name of the connection, and then click Properties.
In the Properties dialog box for the connection, on the Network Adapter tab, click Maximum connections, enter the number of simultaneous remote connections that you want to allow for the connection, and then click OK.

If the Maximum connections option is selected and dimmed, the Limit number of connections Group Policy setting has been enabled and has been applied to the RD Session Host server.
You can also set the maximum number of simultaneous connections allowed for an RD Session Host server by applying the Limit number of connections Group Policy setting. This Group Policy setting is located in Computer Configuration\Policies\Administrative Templates\Windows Components\Remote Desktop Services\Remote Desktop Session Host\Connections and can be configured by using either the Local Group Policy Editor or the Group Policy Management Console (GPMC). Note that the Group Policy setting will take precedence over the setting configured in Remote Desktop Session Host Configuration.




Windows 2012 servers allow a single Remote Desktop session. If only one session is available and you take over another person's live session, you may choose to enable multiple RDP sessions.

Enable Multiple RDP Sessions
Log into the server using Remote Desktop.

Open the start screen (press the Windows key) and type gpedit.msc and open it
Go to Computer Configuration > Administrative Templates > Windows Components > Remote Desktop Services > Remote Desktop Session Host > Connections.
Set Restrict Remote Desktop Services user to a single Remote Desktop Services session to Disabled.
Double click Limit number of connections and set the RD Maximum Connections allowed to 999999.