Wiki, How to add Active Directory group permissions

How do I restrict my wiki pages so that users have to log on? How do I add AD group restrictions to my wiki pages?

Information and instructions for adding AD group permissions to wiki spaces can be found here: https://wiki.illinois.edu/wiki/display/HELP/Wiki+and+UOFI+Active+Directory

Note: New AD groups and changes in group memberships will take up to 4 hours to become available within the Illinois Wiki.