Question : Event ID 4001 on Exchange 2007

Dear All,

I have changed the IP address subnet on our network from 192.168.0.x to 192.168.10.x

Suddenly, i get event id 4001 on my exchange server 2007 and no one is able to send or receive any emails.

Regards,
Nezar Radhi

Answer : Event ID 4001 on Exchange 2007

A transient failure has occurred. The problem may resolve itself in awhile. The service will retry in 56 seconds. Diagnostic information:

Cannot open mailbox /o=FLBANK/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Configuration/cn=Servers/cn=FLB-MAIL/cn=Microsoft System Attendant.
Microsoft.Exchange.Data.Storage.ConnectionFailedTransientException: Cannot open mailbox /o=FLBANK/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Configuration/cn=Servers/cn=FLB-MAIL/cn=Microsoft System Attendant. ---> Microsoft.Mapi.MapiExceptionNetworkError: MapiExceptionNetworkError: Unable to make connection to the server. (hr=0x80004005, ec=2423)
Diagnostic context:
    ......
    Lid: 12952   dwParam: 0x6BA      Msg: EEInfo: prm[0]: Long val: 135
    Lid: 15000   dwParam: 0x6BA      Msg: EEInfo: prm[1]: Pointer val: 0x0000000000000000
    Lid: 15000   dwParam: 0x6BA      Msg: EEInfo: prm[2]: Pointer val: 0x0400A8C000000000
    Lid: 16280   dwParam: 0x6BA      Msg: EEInfo: ComputerName: n/a
    Lid: 8600    dwParam: 0x6BA      Msg: EEInfo: ProcessID: 6184
    Lid: 12696   dwParam: 0x6BA      Msg: EEInfo: Generation Time: 2008-07-20 13:37:30:144
    Lid: 10648   dwParam: 0x6BA      Msg: EEInfo: Generating component: 8
    Lid: 14744   dwParam: 0x6BA      Msg: EEInfo: Status: 10060
    Lid: 9624    dwParam: 0x6BA      Msg: EEInfo: Detection location: 318
    Lid: 13720   dwParam: 0x6BA      Msg: EEInfo: Flags: 0
    Lid: 11672   dwParam: 0x6BA      Msg: EEInfo: NumberOfParameters: 0
    Lid: 19778  
    Lid: 27970   StoreEc: 0x977    
    Lid: 17730  
    Lid: 25922   StoreEc: 0x977    
   at Microsoft.Mapi.MapiExceptionHelper.ThrowIfError(String message, Int32 hresult, Int32 ec, DiagnosticContext diagCtx)
   at Microsoft.Mapi.ExRpcConnection.Create(ConnectionCache connectionCache, ExRpcConnectionCreateFlag createFlags, ConnectFlag connectFlags, String serverDn, String userDn, String user, String domain, String password, String httpProxyServerName, Int32 ulConMod, Int32 lcidString, Int32 lcidSort, Int32 cpid, Int32 cReconnectIntervalInMins, Int32 cbRpcBufferSize, Int32 cbAuxBufferSize)
   at Microsoft.Mapi.ConnectionCache.OpenMapiStore(String mailboxDn, Guid mailboxGuid, Guid mdbGuid, ClientIdentityInfo clientIdentity, String userDnAs, OpenStoreFlag openStoreFlags, CultureInfo cultureInfo, String applicationId)
   at Microsoft.Mapi.ConnectionCache.OpenMailbox(String mailboxDn, Guid mailboxGuid, Guid mdbGuid, WindowsIdentity windowsIdentityAs, String userDnAs, OpenStoreFlag openStoreFlags, CultureInfo cultureInfo, String applicationId)
   at Microsoft.Exchange.Data.Storage.ConnectionCachePool.OpenMailbox(String serverDn, String userDn, String mailboxDn, Guid mailboxGuid, Guid mdbGuid, Object identity, ConnectFlag connectFlag, OpenStoreFlag openStoreFlag, CultureInfo cultureInfo, String clientInfoString, Boolean secondTry)
   --- End of inner exception stack trace ---
   at Microsoft.Exchange.Data.Storage.ConnectionCachePool.OpenMailbox(String serverDn, String userDn, String mailboxDn, Guid mailboxGuid, Guid mdbGuid, Object identity, ConnectFlag connectFlag, OpenStoreFlag openStoreFlag, CultureInfo cultureInfo, String clientInfoString, Boolean secondTry)
   at Microsoft.Exchange.Data.Storage.ConnectionCachePool.OpenMailbox(String serverDn, String userDn, String mailboxDn, Guid mailboxGuid, Guid mdbGuid, Object identity, ConnectFlag connectFlag, OpenStoreFlag openStoreFlag, CultureInfo cultureInfo, String clientInfoString, Boolean secondTry)
   at Microsoft.Exchange.Data.Storage.ConnectionCachePool.OpenMailbox(String serverDn, String userDn, String mailboxDn, Guid mailboxGuid, Guid mdbGuid, Object identity, ConnectFlag connectFlag, OpenStoreFlag openStoreFlag, CultureInfo cultureInfo, String clientInfoString)
   at Microsoft.Exchange.Data.Storage.MailboxSession.Initialize(LogonType logonType, ExchangePrincipal owner, DelegateLogonUser delegateUser, Object identity, OpenMailboxSessionFlags flags)
   at Microsoft.Exchange.Data.Storage.MailboxSession.CreateMailboxSession(LogonType logonType, ExchangePrincipal owner, DelegateLogonUser delegateUser, Object identity, OpenMailboxSessionFlags flags, CultureInfo cultureInfo, String clientInfoString)
   at Microsoft.Exchange.Data.Storage.MailboxSession.OpenAsAdmin(ExchangePrincipal mailboxOwner, CultureInfo cultureInfo, String clientInfoString, Boolean useLocalRpc, Boolean ignoreHomeMdb)
   at Microsoft.Exchange.Data.Storage.MailboxSession.OpenAsAdmin(ExchangePrincipal mailboxOwner, CultureInfo cultureInfo, String clientInfoString)
   at Microsoft.Exchange.Servicelets.SystemAttendantMailbox.Servicelet.Work()