Depending on the security updates that a user has applied -- OWA stops working. Has anyone had the same problem and what did you do to fix it. We are running Exchange 5.5 sp4 on W2k. Thanks Michelle Maddox Network Support Analyst Division of Information & Operations Sedgwick County Kansas 510 N. Main Wichita, KS 67203 mmaddox@xxxxxxxxxxxx 316.660.9886