Wesleyan domain login issues between 3:30 and 3:50 this afternoon

One of our domain controllers that processes logins to the Wesleyan network malfunctioned at 3:30 this afternoon.  Any of our systems that rely on domain logins, including Exchange mail, Web mail, blogs, wikis, and Wesfiles, may have rejected some logins between 3:30 and 3:50 PM.  The problem has been resolved.