1. Turn on Remote Desktop
My Computer | Properties | Remote Settings | Remote | To allow computers that are running remote desktops that use Network Level authentication to connect (more secure) (N)
2. Configure the number of connections per user to 2
After the Windows Server 2008 installation is complete, the default number of Remote Desktop connections per user is 1, and the maximum default number of Remote Desktop session connections per user is 2.
Settings: Control Panel ( category selection "small icon") | Management Tools | Remote Desktop Services | Remote Desktop Session Host Configuration | Edit Settings | Restrict each user to only one session | Properties | "Restrict each user to only one session" before the checkmark is removed.
rdp-tcp | Properties | Network Adapters | The maximum number of connections is changed to 2 (maximum only 2). once the---is done, each user can have two remote session connections at a time.
3. Multi-session Remote Desktop Connection configuration for more than 2 sessions:
Enter Gpedit.msc in run to open the Local Group Policy Editor | Computer Configuration | Administrative Templates | Windows Components | Remote Desktop Services | Remote
Desktop Session Host | Connection | Limit the number of connections | Edit | Select "Enabled" | Options: Maximum number of RD connections allowed: 999999 | Application | Are you sure
Install Role: Start | Management Tools | Server Manager | Roles | Add Roles | Select Remote Desktop Services next ... Restart your computer | Complete