[SysAdm]Enable Remote Desktop Connection on Windows 8 Enterprise - lifuzu/cafe GitHub Wiki

To add a user account to the group "Remote Desktop Users"

Open Microsoft Management Console by clicking the Start button Picture of the Start button, typing "mmc" into the search box, and then pressing Enter.‌ Administrator permission required If you're prompted for an administrator password or confirmation, type the password or provide confirmation.

In the left pane, click Local Users and Groups.

If you don't see Local Users and Groups

If you don't see Local Users and Groups, it's probably because that snap-in hasn't been added to Microsoft Management Console. Follow these steps to install it:

In Microsoft Management Console, click the File menu, and then click Add/Remove Snap-in.

In the Add or Remove Snap-ins dialog box, click Local Users and Groups, and then click Add.

In the Choose Target Machine dialog box, click Local computer, and then click Finish.

Click OK.

Double-click the Groups folder.

Right-click the group you want to add the user account to, and then click Add to Group.

Click Add, and then type the name of the user account.

Click Check Names, and then click OK.

REFERENCE:
http://windows.microsoft.com/en-US/windows7/Why-can-t-I-connect-using-Remote-Desktop-Connection