This has been logged as defect number 28635
1. Click on the "All Local Users" tab at the top of the MCU.
2. Search for the user you need to map and make sure it's on the correct host and select the user (you can also search by host using the drop down)
3. On the right side of the screen there is a search box under "Require AD Logon", search for the AD user you wish to log in as
4. Click on the "Require AD logon to Host" button at the bottom of the "Require AD Logon" frame.