Problem: I have an AD group that is used to maintain a list of approvers at the manager level within my organization. We now need to use this exact same list across multiple sites. Our solution was to create an active directory group, and add it to a group on each site to filter a people picker. However, once this is done, the people picker can't find the members who are in the AD Group, but it can see the users manually added to the SharePoint group.
Thanks for any advice.