These are Active Directory replication problems. I recommend that you start with a netdiag and a dcdiag on all the DCs and correct the reported problems, as well as spending some time at eventid.net. Those errors are pretty generic unfortunately. It could be any of a gazillion things. From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Amit Kapoor Sent: Saturday, December 30, 2006 3:37 AM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Errors in Global Catalog Server Importance: High Hi, I have Windows 2003 Server which is a Domain Controller and Exchange 2003 which is also having windows 2003 Standard edition. I am getting error messages on the Global catalog server daily and they are getting repeated after every 10 or 15 min. Snapshots of the error messages are attached. Please help to solve the problem. ps. check out our latest product: www.DriveInside.com - India's No. 1 Auto Website ___________________________________________________________ Amit Kapoor | Network Engineer Module One India Ltd. | A88 Okhla Phase II, New Delhi - 110020 Voice : +91-11-41859200 ext. 204 | Fax : +91-11-41859220 | Mobile : +91-98730-86450 Email : amit@xxxxxxxxxxxxx | Web: www.moduleone.com