One domain controller (udc05.ad.uillinois.edu) will be removed from service at 10:00 AM on 5/17. It will continue to be reachable but will not advertise for new connections from clients. During this time, clients will re-establish connections with a different domain controller. At 9:00 AM on 5/18 it will be powered down for hardware maintenance. It is anticipated to be back in service by 10:00 AM.