Use Group Policy Management to manage group policies.

• Start → Run → gpmc.msc

Use Group Policy Editor to edit a specific Group Policy Object (GPO).

• Start → Run → gpedit.msc

Group Policies 'flow down', so you may need to Block Inheritance to a container using Group Policy Management.

• Right-click container → Block Inheritance

http://www.nitrobit.com/grouppolicy.html

http://www.nitrobit.com/products.html

http://www.nitrobit.com/order_ngp.html

http://technet.microsoft.com/en-us/library/gg563788.aspx

Edit an existing group policy, or add a new one, and add 'Administrators':

Computer Configuration → Policies → Windows Settings → Security Settings → Local Policies → User Rights Assignment → Log on as Batch Job

By default, background images are not displayed nor can users change the background unless the RDP client is set to 'Lan' or the best connection speed.

http://virot.eu/push-a-solid-colored-background-to-a-windows-server-2012-or-later/

http://social.technet.microsoft.com/Forums/windowsserver/en-US/9c72a524-507f-4861-a9de-0b42c711897a/how-to-change-desktop-background-color-of-windows-2008-r2-remote-desktop-server-users?forum=winserverTS

http://www.techieshelp.com/set-desktop-background-colour-with-a-gpo/