Below are the Eventlogs.Please help me.Its very urgent. 3/7/2011 6:09:44 PM MSExchangeDSAccess Error Topology 2114 N/A ECONNECT "Process INETINFO.EXE (PID=1444). Topology Discovery failed, error 0x80040931. For more information, click http://www.microsoft.com/contentredirect.asp." 3/7/2011 6:09:31 PM Userenv Error None 1053 NT AUTHORITY\SYSTEM ECONNECT Windows cannot determine the user or computer name. (Access is denied. ). Group Policy processing aborted. 3/7/2011 6:08:35 PM MSExchangeDSAccess Error Topology 2114 N/A ECONNECT "Process INETINFO.EXE (PID=1444). Topology Discovery failed, error 0x80040931. For more information, click http://www.microsoft.com/contentredirect.asp."

Hi Verify everything, ip address, dns settings Ping DC, does it answer? If you can, start ExBPA and run a health checkJonas Andersson | Microsoft Community Contributor Award 2011 | MCITP: EMA 2007/2010 | Blog: http://www.testlabs.se/blog | Follow me on twitter: jonand82

Hi This is one obvious problem. Your exchange can’t access AD. You should check setting of network (can you ping DC server?dns,add new firewall ?) Then please check your permission. Maybe network is well and dc administrator changes permission of account. Event 2114 This problem occurs because the Exchange security groups do no have the appropriate user rights to enable the Directory Service Access (DSAccess) component to communicate with Active Directory. You can fix it according to this article. http://support.microsoft.com/kb/919089 Event 1053 it shows network connectivity or configuration problem exists. You can fix it according to this article http://www.microsoft.com/technet/support/ee/transform.aspx?ProdName=Windows+Operating+System&ProdVer=5.2&EvtID=1053&EvtSrc=Userenv&LCID=1033

Hi Do you have anything to update your issue ?