Hello , We have a windows 2003 sp2 running Exchange 2007 Rollup 7 . This serveris aslo Domaincontroller and DNS Server . Today when i want to update with Exchaneg 2007 Sp1 , get error as below .Also IS /SA service do not start automatically . Followed this documented , but no luck. netdiag , Netdom /Query:FSmo , no problem .http://social.technet.microsoft.com/Forums/en-US/exchangesoftwareupdate/thread/cacf0ed0-76ff-4455-a58e-301c0a0cde41/Any help will be greatly appreciated !!!!3/7/2009 12:35:31 PM] [2] Fixing the objects under container object "Resource Schema" with filter "$null".[3/7/2009 12:35:31 PM] [2] Verifying the existence of container object "Mobile Mailbox Policies".[3/7/2009 12:35:31 PM] [2] Fixing the objects under container object "Mobile Mailbox Policies" with filter "$null".[3/7/2009 12:35:31 PM] [2] Verifying the existence of container object "Transport Settings".[3/7/2009 12:35:31 PM] [2] Fixing the objects under container object "Transport Settings" with filter "$null".[3/7/2009 12:35:31 PM] [2] [ERROR] Active Directory operation failed on mailserver.scbec.org. This error could have been caused by user input or by the Active Directory server being unavailable. Please retry at a later time. Additional information: Additional information: The directory service encountered an unknown failure.Active directory response: 000020EF: SvcErr: DSID-020A00A4, problem 5012 (DIR_ERROR), data 1004.[3/7/2009 12:35:31 PM] [2] [ERROR] An operation error occurred.[3/7/2009 12:35:31 PM] [2] Ending processing.[3/7/2009 12:35:31 PM] [1] The following 1 error(s) occurred during task execution:[3/7/2009 12:35:31 PM] [1] 0. ErrorRecord: Active Directory operation failed on mailserver.scbec.org. This error could have been caused by user input or by the Active Directory server being unavailable. Please retry at a later time. Additional information: Additional information: The directory service encountered an unknown failure.Active directory response: 000020EF: SvcErr: DSID-020A00A4, problem 5012 (DIR_ERROR), data 1004.[3/7/2009 12:35:31 PM] [1] 0. ErrorRecord: Microsoft.Exchange.Data.Directory.ADPossibleOperationException: Active Directory operation failed on mailserver.scbec.org. This error could have been caused by user input or by the Active Directory server being unavailable. Please retry at a later time. Additional information: Additional information: The directory service encountered an unknown failure.Active directory response: 000020EF: SvcErr: DSID-020A00A4, problem 5012 (DIR_ERROR), data 1004. ---> System.DirectoryServices.Protocols.DirectoryOperationException: An operation error occurred. at System.DirectoryServices.Protocols.LdapConnection.ConstructResponse(Int32 messageId, LdapOperation operation, ResultAll resultType, TimeSpan requestTimeOut, Boolean exceptionOnTimeOut) at System.DirectoryServices.Protocols.LdapConnection.SendRequest(DirectoryRequest request, TimeSpan requestTimeout) at Microsoft.Exchange.Data.Directory.PooledLdapConnection.SendRequest(DirectoryRequest request, LdapOperation ldapOperation) at Microsoft.Exchange.Data.Directory.ADGenericReader.GetNextResultCollection(Type controlType, DirectoryControl& responseControl) --- End of inner exception stack trace --- at Microsoft.Exchange.Data.Directory.ADSession.AnalyzeDirectoryError(PooledLdapConnection connection, DirectoryRequest request, DirectoryException de, Int32 totalRetries, Int32 retriesOnServer) at Microsoft.Exchange.Data.Directory.ADGenericReader.GetNextResultCollection(Type controlType, DirectoryControl& responseControl) at Microsoft.Exchange.Data.Directory.ADPagedReader`1.GetNextResultCollection() at Microsoft.Exchange.Data.Directory.ADPagedReader`1.GetNextPage() at Microsoft.Exchange.Data.Directory.ADPagedReader`1.<GetEnumerator>d__0.MoveNext() at Microsoft.Exchange.Management.Deployment.BuildToBuildFixExchangeObjectVersion.FixActiveDirectoryTree(ADObjectId rootId, QueryFilter searchFilter, Boolean fixMinAdminVersion) at Microsoft.Exchange.Management.Deployment.BuildToBuildFixExchangeObjectVersion.InternalProcessRecord() at Microsoft.Exchange.Configuration.Tasks.Task.ProcessRecord()[3/7/2009 12:35:31 PM] [1] [ERROR] Active Directory operation failed on mailserver.scbec.org. This error could have been caused by user input or by the Active Directory server being unavailable. Please retry at a later time. Additional information: Additional information: The directory service encountered an unknown failure.Active directory response: 000020EF: SvcErr: DSID-020A00A4, problem 5012 (DIR_ERROR), data 1004.[3/7/2009 12:35:31 PM] [1] [ERROR] An operation error occurred.[3/7/2009 12:35:31 PM] [1] Setup is halting task execution because of one or more errors in a critical task.[3/7/2009 12:35:31 PM] [1] Finished executing component tasks.[3/7/2009 12:35:31 PM] [1] Ending processing. ciscosom

Issue description: Exchange 2007 RU7 installed on one single windows 2003 DC. During the upgrade to SP1, error occurred Active Directory operation failed on mailserver.scbec.org. This error could have been caused by user input or by the Active Directory server being unavailable. Active directory response: 000020EF: SvcErr: DSID-020A00A4, problem 5012 (DIR_ERROR), data 1004 Troubleshooting: 1. Please verify the communication between DC and DNS. The issue maybe relate to DNS connectivity Dcdiag /s:DCname /v >c:\dcdiag.txt 2. Please check the error event in the application log after failed upgrading 3. Please run ExBPA for health check Resources: Similar case: Getting Event ID error 4015 and 4004