hi Recently i have setup exchange 2007 with sp1 on 2 new servers, 1 is CAS/HUB and 2nd is Mailbox server. setup was done correctly and all outlook clients connected. 2 days before i have installed update rollup 3 and 6 after that all exchange services was not starting and giving error on both servers, i am trying to uninstall update rollups but it is not uninstalling. then i installed rollup 8 but not luck the problem is same. BACKUPGROUND: Servers: HP DL380 6GB ram, 600GB sas Raid 5+0 HDs OS: Server 2003 std 64bit, exchange 2007 Std 64bit here is event logs: Source: MSExchangeADAccess Catagory: topology eventid: 2142 Process MSEXCHANGEADTOPOLOGYSERVICE.EXE (PID=4388). Topology discovery failed, error 0x8007077f. Source: MSExchangeCommon Catagory: general eventid: 4999 Watson report about to be sent to dw20.exe for process id: 4580, with parameters: E12, c-RTL-AMD64, 08.01.0375.002, M.E.Pop3, unknown, unknown, System.Exception, 0, unknown. ErrorReportingEnabled: False I have searched a lot but couldnt found any information. can somebody help me out. thanx Kazim

HI,Base on my research on this matter seem you have a wrong configuration with Active Directory Site configuration. Due to that issues cannot find suitable domain controller by Exchange 2007.Please run DCDIAg on this pc and post it here.RegardsChinthaka

Hi, First Id like to know if Rollup 8 has been installed on Server1(CAS/HUB) and Server2(Mailbox). You can check add/remove to see if Rollup 8 has been listed there. If yes,then please try to manaully restart the Microsoft Exchange related services. Services Installed by Exchange Setup http://technet.microsoft.com/en-us/library/aa998342.aspx If we cannot start the services,then please try to follow kb944752 to add config file. Exchange Server 2007 managed code services do not start after you install an update rollup for Exchange Server 2007 http://support.microsoft.com/kb/944752 Besides, please try to run Ran Nltest /dsgetdc: /GC to see if it will return the domain controller. Also please check if any service which Startup Type should be automatic has been stopped.Please try to start these services and then check the issue again. Network Connectivity http://technet.microsoft.com/en-us/library/cc961803.aspx Regards, Xiu