Procedure to add users in Windows 2008 R2

1.   Go to Server Manager by clicking on Start and then Administrative Tools.
2.   Expand the Configuration option.
3.   Expand Users and Groups.
4.   Right click on User and select New User.
5.   Enter the details.

NOTE: This will only create the user.  This will not give direct server access to the created user.  If you want to give the user ability to remotely login into the server.  Then you need to provide appropriate permissions.