Ever since migrating a server from Exchange 2007 to a new Exchange 2013 server I've had this problem whereby the Mailbox "unexpectedly" dismounts every day at about the same time.
I've seen a similar thread on the issue here though this didn't seem to get resolved (title Exchange 2013 database dismounts unexpectedly).
The error seems to get about 7 minutes later every day though I can't see what if any jobs might be running to cause this.
The MailboxDatabaseFailureItems throws up between 3 and 5 messages showing the below:
--
Log Name: Microsoft-Exchange-MailboxDatabaseFailureItems/Operational
Source: Microsoft-Exchange-MailboxDatabaseFailureItems
Date: 30/09/2014 14:40:15
Event ID: 1
Task Category: Store
Level: Information
Keywords:
User: SYSTEM
Computer: exserv.domain.com
Description:
Failure Item (Namespace=Store, Tag=UnexpectedDismount, Database=CN=dbname,CN=Databases,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=domain,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=domain,DC=com, Instance=dbname)
At the time of the DB failure this message is given in the application eventlog, though the log files it mentions are never there:
---
Log Name: Application
Source: Windows Error Reporting
Date: 30/09/2014 14:40:15
Event ID: 1001
Task Category: None
Level: Information
Keywords: Classic
User: N/A
Computer: EXserv.domain.com
Description:
Fault bucket , type 0
Event Name: E12
Response: Not available
Cab Id: 0
Problem signature:
P1: c-RTL-AMD64
P2: 15.00.0995.029
P3: M.E.Store.Worker
P4: M.E.S.Storage.StoreCommonServices
P5: M.E.S.S.S.QueryPlanner.CreatePlanWithJustLazyIndex
P6: System.NullReferenceException
P7: 361
P8: 15.00.0995.027
P9:
P10:
Attached files:
C:\Windows\Temp\fa9daef1-4635-4fa3-bdda-3e1845a3e6fb\report.txt
C:\Windows\Temp\fa9daef1-4635-4fa3-bdda-3e1845a3e6fb\report.xml
These files may be available here:
Analysis symbol:
Rechecking for solution: 0
Report Id: 3b10f1d6-48a7-11e4-8109-00155da22d06
Report Status: 96
Hashed bucket:
and also this error:
Log Name: Application
Source: MSExchange Unified Messaging
Date: 30/09/2014 14:40:15
Event ID: 1678
Task Category: UMCore
Level: Error
Keywords: Classic
User: N/A
Computer: exserv.domain.com
Description:
Error occurred uploading grammar files to system mailbox. Organization: "Enterprise", Mailbox: "1705f1bb-0e04-4cef-959a-a896443c1cd8", Run Id: "1f0eabbe-3e3a-46be-958f-6dcbe2df5a0e", Error: "Microsoft.Exchange.Data.Storage.ConnectionFailedTransientException:
Cannot open mailbox /o=domain/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Configuration/cn=Servers/cn=exservcn=Microsoft System Attendant. ---> Microsoft.Mapi.MapiExceptionNetworkError: MapiExceptionNetworkError: Unable to open message store.
(hr=0x80040115, ec=-2147221227)
Diagnostic context:
Lid: 55847 EMSMDBPOOL.EcPoolSessionDoRpc called [length=141]
Lid: 59943 EMSMDBPOOL.EcPoolSessionDoRpc exception [rpc_status=0x6BE][latency=30469]
Lid: 62184
Lid: 16280 dwParam: 0x0 Msg: EEInfo: ComputerName: n/a
Lid: 8600 dwParam: 0x0 Msg: EEInfo: ProcessID: 6612
Lid: 12696 dwParam: 0x0 Msg: EEInfo: Generation Time: 0414-09-30T13:40:15.2380000Z
Lid: 10648 dwParam: 0x0 Msg: EEInfo: Generating component: 2
Lid: 14744 dwParam: 0x0 Msg: EEInfo: Status: 1726
Lid: 9624 dwParam: 0x0 Msg: EEInfo: Detection location: 1010
Lid: 13720 dwParam: 0x0 Msg: EEInfo: Flags: 0
Lid: 11672 dwParam: 0x0 Msg: EEInfo: NumberOfParameters: 1
Lid: 12952 dwParam: 0x0 Msg: EEInfo: prm[0]: Long val: 3221227265
Lid: 23260 Win32Error: 0x6BE
Lid: 43249
Lid: 39153 StoreEc: 0x80040115
Lid: 32881 StoreEc: 0x80040115
Lid: 50035
Lid: 64625 StoreEc: 0x80040115
Lid: 52176 ClientVersion: 15.0.995.27
Lid: 50032 ServerVersion: 15.0.995.6027
Lid: 50128
Lid: 50288
Lid: 23354 StoreEc: 0x80040115
Lid: 25913
Lid: 21817 ROP Failure: 0x80040115
Lid: 26297
Lid: 16585 StoreEc: 0x80040115
Lid: 32441
Lid: 1706 StoreEc: 0x80040115
Lid: 24761
Lid: 20665 StoreEc: 0x80040115
Lid: 25785
Lid: 29881 StoreEc: 0x80040115
at Microsoft.Mapi.MapiExceptionHelper.InternalThrowIfErrorOrWarning(String message, Int32 hresult, Boolean allowWarnings, Int32 ec, DiagnosticContext diagCtx, Exception innerException)
at Microsoft.Mapi.ExRpcConnection.OpenMsgStore(OpenStoreFlag storeFlags, String mailboxDn, Guid mailboxGuid, Guid mdbGuid, String& correctServerDn, ClientIdentityInfo clientIdentityAs, String userDnAs, Boolean unifiedLogon, String applicationId,
Byte[] tenantHint, CultureInfo cultureInfo)
at Microsoft.Mapi.MapiStore.OpenMapiStore(String serverDn, String userDn, String mailboxDn, Guid guidMailbox, Guid guidMdb, String userName, String domainName, String password, String httpProxyServerName, ConnectFlag connectFlags, OpenStoreFlag
storeFlags, CultureInfo cultureInfo, Boolean wantRedirect, String& correctServerDN, ClientIdentityInfo clientIdentity, Boolean unifiedLogon, String applicationId, Client xropClient, Boolean wantWebServices, Byte[] clientSessionInfo, TimeSpan connectionTimeout,
TimeSpan callTimeout, Byte[] tenantHint)
at Microsoft.Mapi.MapiStore.OpenMailbox(String serverDn, String userDn, Guid guidMailbox, Guid guidMdb, String userName, String domainName, String password, ConnectFlag connectFlags, OpenStoreFlag storeFlags, CultureInfo cultureInfo, WindowsIdentity
windowsIdentity, String applicationId, Byte[] tenantPartitionHint, Boolean unifiedLogon)
at Microsoft.Exchange.Data.Storage.MailboxSession.ForceOpen(MapiStore linkedStore, Boolean unifiedSession)
--- End of inner exception stack trace ---
at Microsoft.Exchange.Data.Storage.MailboxSession.ForceOpen(MapiStore linkedStore, Boolean unifiedSession)
at Microsoft.Exchange.Data.Storage.MailboxSession.Initialize(MapiStore linkedStore, LogonType logonType, IExchangePrincipal owner, DelegateLogonUser delegateUser, Object identity, OpenMailboxSessionFlags flags, GenericIdentity auxiliaryIdentity,
Boolean unifiedSession)
at Microsoft.Exchange.Data.Storage.MailboxSession.<>c__DisplayClass1c.<CreateMailboxSession>b__1a(MailboxSession mailboxSession)
at Microsoft.Exchange.Data.Storage.MailboxSession.InternalCreateMailboxSession(LogonType logonType, IExchangePrincipal owner, DelegateLogonUser delegatedUser, CultureInfo cultureInfo, String clientInfoString, IBudget budget, Action`1 initializeMailboxSession,
InitializeMailb"
There are various errors after that but I think that all are related to the Mailbox DB being offline.
3 minutes later I get this message:
Log Name: Application
Source: MSExchangeIS
Date: 30/09/2014 14:43:04
Event ID: 1013
Task Category: General
Level: Error
Keywords: Classic
User: N/A
Computer: exserv.domain.com
Description:
The mailbox with mailboxguid "1705f1bb-0e04-4cef-959a-a896443c1cd8" caused crash or resource outage on database (GUID="3eeb9b83-2f37-4364-94fa-1d12d48ccc08")
When I look up the Mailbox with the Guid 1705f1bb-0e04-4cef-959a-a896443c1cd8 I find that this is a mailbox called "Microsoft Exchange". It isn't connected and contains few items.
I've tried looking around to find out anywhere what this mailbox may do but can't find anything but I can see that other Exchange Servers have this account from both looking at other clients and noticing it listed in other forum posts on screen shots.
The Legacy DN given for it is:
/o=domain/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=c833be3f23fc4b73b99342e81ca4076c-SystemMa...
However when I look in Adsiedit I don't find a recipients CN under that location.
I've tried removing the mailbox but then I get this error
---
The mailbox that you specified is connected to "Microsoft Exchange". Only disconnected mailboxes can be reconnected.
Specified mailbox: "1705f1bb-0e04-4cef-959a-a896443c1cd8".
+ CategoryInfo : NotSpecified: (:) [Remove-Mailbox], TaskInvalidOperationException
+ FullyQualifiedErrorId : [Server=exserv,RequestId=7a34591c-2666-479f-9292-083af718963c,TimeStamp=03/10/2014 14:
59:27] [FailureCategory=Cmdlet-TaskInvalidOperationException] 3C8D67B5,Microsoft.Exchange.Management.RecipientTask
s.RemoveMailbox
+ PSComputerName : exserv.domain.com
I'm at a loss as to what is causing this daily failure.
Exchange version is 2013 - CU6
Windows Version 2012 R2.
Exchange is just running on 1 server and the legacy 2007 server has now been fully decommissioned.
Any Ideas?