I'm getting the following error after a eseutil /p repair on a mailbox that wasn't mounting (not ideal I know)...

A similar problem was asked in the following forum

https://social.technet.microsoft.com/Forums/ru-RU/4d03ce7b-058a-42ad-95be-6d7a63144db2/-?forum=exchange2013ru

Per a suggestion from the above thread, did a new-MailboxRepairRequest on the entire database to repair any corrupt mailboxes. Unfortunately, it is not running -- a get-MailboxRepairRequest shows the Job State as queued and Progress 0. Any suggestions on how to get the repair to start processing the queues?

Here is the message I'm getting:

Microsoft Exchange Information Store worker process (17404) has encountered an unexpected database error (Microsoft.Isam.Esent.Interop.EsentKeyDuplicateException: Illegal duplicate key
   at Microsoft.Isam.Esent.Interop.Server2003.Server2003Api.JetUpdate2(JET_SESID sesid, JET_TABLEID tableid, Byte[] bookmark, Int32 bookmarkSize, Int32& actualBookmarkSize, UpdateGrbit grbit)
   at Microsoft.Exchange.Server.Storage.PhysicalAccessJet.JetTableOperator.Insert(IList`1 columns, IList`1 values, Column identityColumnToFetch, Boolean unversioned, Boolean ignoreDuplicateKey, Object& identityValue)) for database 'ExDb13' with a call stack of
   at Microsoft.Exchange.Server.Storage.PhysicalAccessJet.JetTableOperator.Insert(IList`1 columns, IList`1 values, Column identityColumnToFetch, Boolean unversioned, Boolean ignoreDuplicateKey, Object& identityValue)
   at Microsoft.Exchange.Server.Storage.PhysicalAccessJet.JetInsertOperator.ExecuteScalar()
   at Microsoft.Exchange.Server.Storage.PhysicalAccess.DataRow.Insert(IConnectionProvider connectionProvider)
   at Microsoft.Exchange.Server.Storage.StoreCommonServices.ObjectPropertyBag.Flush(Context context)
   at Microsoft.Exchange.Server.Storage.LogicalDataModel.Item.Flush(Context context)
   at Microsoft.Exchange.Server.Storage.LogicalDataModel.Message.Flush(Context context)
   at Microsoft.Exchange.Server.Storage.LogicalDataModel.Message.SaveChanges(Context context)
   at Microsoft.Exchange.Server.Storage.LogicalDataModel.TopMessage.SaveChanges(Context context, SaveMessageChangesFlags flags)
   at Microsoft.Exchange.Protocols.MAPI.MapiMessage.SaveChangesInternal(MapiContext context, MapiSaveMessageChangesFlags saveFlags, ExchangeId& newMid)
   at Microsoft.Exchange.Protocols.MAPI.MapiMessage.SaveChanges(MapiContext context, MapiSaveMessageChangesFlags saveFlags, ExchangeId& newMid)
   at Microsoft.Exchange.Server.Storage.MapiDisp.RopHandler.SaveChangesMessage(MapiContext context, MapiMessage message, SaveChangesMode saveChangesMode, SaveChangesMessageResultFactory resultFactory)
   at Microsoft.Exchange.Server.Storage.MapiDisp.RopHandlerBase.SaveChangesMessage(IServerObject serverObject, SaveChangesMode saveChangesMode, SaveChangesMessageResultFactory resultFactory)
   at Microsoft.Exchange.RpcClientAccess.Parser.RopSaveChangesMessage.InternalExecute(IServerObject serverObject, IRopHandler ropHandler, ArraySegment`1 outputBuffer)
   at Microsoft.Exchange.RpcClientAccess.Parser.InputRop.Execute(IConnectionInformation connection, IRopDriver ropDriver, ServerObjectHandleTable handleTable, ArraySegment`1 outputBuffer)
   at Microsoft.Exchange.RpcClientAccess.Parser.RopDriver.ExecuteRops(List`1 inputArraySegmentList, ServerObjectHandleTable serverObjectHandleTable, ArraySegment`1 outputBuffer, Int32 outputIndex, Int32 maxOutputSize, Boolean isOutputBufferMaxSize, Int32& outputSize, AuxiliaryData auxiliaryData, Boolean isFake, Byte[]& fakeOut)
   at Microsoft.Exchange.RpcClientAccess.Parser.RopDriver.Execute(IList`1 inputBufferArray, ArraySegment`1 outputBuffer, Int32& outputSize, AuxiliaryData auxiliaryData, Boolean isFake, Byte[]& fakeOut)
   at Microsoft.Exchange.Server.Storage.MapiDisp.MapiRpc.<>c__DisplayClass9.<DoRpc>b__6(MapiContext operationContext, MapiSession& session, Boolean& deregisterSession, AuxiliaryData auxiliaryData)
   at Microsoft.Exchange.Server.Storage.MapiDisp.MapiRpc.Execute(IExecutionDiagnostics executionDiagnostics, MapiContext outerContext, String functionName, Boolean isRpc, IntPtr& contextHandle, Boolean tryLockSession, String userDn, IList`1 dataIn, Int32 sizeInMegabytes, ArraySegment`1 auxIn, ArraySegment`1 auxOut, Int32& sizeAuxOut, ExecuteDelegate executeDelegate)
   at Microsoft.Exchange.Server.Storage.MapiDisp.MapiRpc.DoRpc(IExecutionDiagnostics executionDiagnostics, IntPtr& contextHandle, IList`1 ropInArraySegments, ArraySegment`1 ropOut, Int32& sizeRopOut, ArraySegment`1 auxIn, ArraySegment`1 auxOut, Int32& sizeAuxOut, Boolean fakeRequest, Byte[]& fakeOut)
   at Microsoft.Exchange.Server.Storage.MapiDisp.PoolRpcServer.EcDoRpc(MapiExecutionDiagnostics executionDiagnostics, IntPtr& sessionHandle, UInt32 flags, UInt32 maximumResponseSize, ArraySegment`1 request, ArraySegment`1 auxiliaryIn, IPoolSessionDoRpcCompletion completion)
   at Microsoft.Exchange.Server.Storage.MapiDisp.PoolRpcServer.EcPoolSessionDoRpc_Unwrapped(MapiExecutionDiagnostics executionDiagnostics, IntPtr contextHandle, UInt32 sessionHandle, UInt32 flags, UInt32 maximumResponseSize, ArraySegment`1 request, ArraySegment`1 auxiliaryIn, IPoolSessionDoRpcCompletion completion)
   at Microsoft.Exchange.Server.Storage.MapiDisp.PoolRpcServer.<>c__DisplayClassf.<EcPoolSessionDoRpc>b__c()
   at Microsoft.Exchange.Common.IL.ILUtil.DoTryFilterCatch[T](TryDelegate tryDelegate, GenericFilterDelegate filterDelegate, GenericCatchDelegate catchDelegate, T state)
   at Microsoft.Exchange.Server.Storage.MapiDisp.PoolRpcServer.EcPoolSessionDoRpc(IntPtr contextHandle, UInt32 sessionHandle, UInt32 flags, UInt32 maximumResponseSize, ArraySegment`1 request, ArraySegment`1 auxiliaryIn, IPoolSessionDoRpcCompletion completion)
   at EcPoolSessionDoRpcRpc.EcDispatchCall(EcPoolSessionDoRpcRpc* , SafeRpcAsyncStateHandle pAsyncState, IPoolRpcServer server)
   at PoolRpcServer_Wrapper.InternalExecute(PoolRpcServer_Wrapper* , SafeRpcAsyncStateHandle pAsyncState)
   at Microsoft.Exchange.Rpc.ManagedExceptionAsyncCrashWrapper.Execute<class Microsoft::Exchange::Rpc::PoolRpc::SafeEcPoolSessionDoRpcRpcAsyncStateHandle>(ManagedExceptionAsyncCrashWrapper* , _RPC_ASYNC_STATE* pAsyncState)
   at EcPoolSessionDoRpc_Managed(_RPC_ASYNC_STATE* pAsyncState, Void* cpxh, UInt32 ulSessionHandle, UInt32* pulFlags, UInt32 cbIn, Byte* rgbIn, UInt32* pcbOut, Byte** ppbOut, UInt32 cbAuxIn, Byte* rgbAuxIn, UInt32* pcbAuxOut, Byte** ppbAuxOut)
.

• Edited by whydoesthisdisplaynamehavetobeunique Tuesday, August 11, 2015 4:41 PM

Restoring from backup would work as a last resort, but I'm already had several days out.

As an update, I've done all of the suggested

eseutil /p

eseutil /d

new-MailboxRepairRequest

Still getting the error. This affected 4 mailboxes. I exported each one to PST's via Outlook (the Exchange level export just hangs at processing but does not finish).

I'll work on migrating the rest of the users to a fresh database.

• Marked as answer by whydoesthisdisplaynamehavetobeunique 14 hours 40 minutes ago

You can remove the database and log files (or move them to another folder) and then mount the database with the -Force switch.  That'll create a new empty database and users will have "dial tone" mail service.  Then you can restore the database to a recovery database and merge the recovered data back into their mailboxes.