2008 R2 - Enable Multiple RDP sessions

Server 2008 R2 Option 1: Enable Multiple RDP sessions from TSCONFIG

Note: tsconfig.msc does not work on Windows Server 2012
1. On the server, click Start and in the search/run box type tsconfig.msc{enter}. Locate "Restrict each user to a single session" Right click > Properties.

2. Remove the tick from "Restrict each user to a single session" > Apply > OK.