In support of their move to Exchange 2010 and Unified Communications, the UIUC campus is undergoing a transition from many active directory domains to more unified domain strategy. They have created a new UOFI active directory domain and are well into the process of migrating users into it. And as UA folks who work at UIS are moved into the new UOFI domain, their access to UIS services (printers, mailboxes, the wireless network, etc.) using their UIUC credentials has broken.
We are working to establish a new active directory trust between the UIS and UOFI domains. As soon as that is in place, the access issues should go away.