Exchange 2016 to 2019 On-Prem arbitration mailbox fails BigFunnelTransientException

Question

Exchange 2016 to 2019 On-Prem arbitration mailbox fails BigFunnelTransientException

Just_Makin_A_Living 0

Hi,

I've moved six of the seven arbitration inboxes, the last one refuses to migrate.

I'm getting the exception "Connection to the Content Transformation Service has failed."

We had started moving inboxes to the 2019 servers, got half a dozen moved, then they started to stall on big funnel exceptions. I've moved all of the inboxes back but one. I've tried creating a new non-dag database to move the mailbox into, still no success.

Indexing is working, both search services are running.

Any help appreciated...

thanks,

Steve

Anonymous

2023-11-29T07:15:06.7266667+00:00

I wanted to check in and thank you for your time and patience throughout this issue.

If the information helped address your question, please Accept the answer. This will help us and also improve searchability for others in the community who might be researching similar information.
Bobby West 0 Reputation points

2025-10-22T16:57:39.32+00:00

Hi @Just_Makin_A_Living ,

I am running into this exact issue with the last arbitration mailbox and 2 other mailboxes in the org. Did you ever end up resolving!? any chance you remember the solution?
Just Makin a Living 0 Reputation points

2025-10-22T17:02:47.66+00:00

Yep i ended up deleting and recreating the arbitration mailbox. I'd never done that before but it really wasn't hard to do.
Bobby West 0 Reputation points

2025-10-22T17:08:23.72+00:00

Interesting! I will give that a go then, thanks very much for the quick response!!

1 answer

Your answer

Anonymous

2023-11-29T07:15:06.7266667+00:00

I wanted to check in and thank you for your time and patience throughout this issue.

If the information helped address your question, please Accept the answer. This will help us and also improve searchability for others in the community who might be researching similar information.
Bobby West 0 Reputation points

2025-10-22T16:57:39.32+00:00

Hi @Just_Makin_A_Living ,

I am running into this exact issue with the last arbitration mailbox and 2 other mailboxes in the org. Did you ever end up resolving!? any chance you remember the solution?
Just Makin a Living 0 Reputation points

2025-10-22T17:02:47.66+00:00

Yep i ended up deleting and recreating the arbitration mailbox. I'd never done that before but it really wasn't hard to do.
Bobby West 0 Reputation points

2025-10-22T17:08:23.72+00:00

Interesting! I will give that a go then, thanks very much for the quick response!!

Answer 1

Anonymous

Hello @Just_Makin_A_Living

Check if StatusDetail is "TransientFailureTarget"?

If yes, try this: setting the Microsoft Exchange Search Host Controller back to Automatic and starting it

https://community.spiceworks.com/topic/2310037-exchange-2016-to-2019-all-mailbox-move-requests-fail

(Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.)

Regards

Shaofan

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

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Just_Makin_A_Living 0 Reputation points

2023-11-22T12:54:08.1566667+00:00

Hi Shaofan, Thanks, both search services are running on all of the mailbox servers and i've rebooted them multiple times, that isn't the problem. Best regards, Steve
Anonymous

2023-11-28T08:17:52.9133333+00:00

Hello Just_Makin_A_Living

Sorry for the late reply!

I did some searching and there doesn't seem to be any more useful information for this error. Please try the blog here. Hope this helps! https://www.alitajran.com/mailbox-move-failure/

(Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.)

In addition, since the forum has some restrictions, you may also consider contacting online or phone support.

https://learn.microsoft.com/en-us/microsoft-365/admin/get-help-support?view=o365-worldwide

thank you for your time and patience throughout this issue.

If the information helped address your question, please Accept the answer. This will help us and also improve searchability for others in the community who might be researching similar information.

Just_Makin_A_Living 0

Hi Sahofan,

Both search services are set to automatic and running on all of our exchange servers.

Sorry for the delay, the 2019 servers hadn't had their patches applied. I also had a DFS replication problem.

I've now patched the servers, fixed the replication problem, applied group policies.

ediscovery was broken, i've moved the arbitration inboxes to the 2019 servers and ediscovery now works.

It's still a problem.

These databases are in a DAG.

I've found out that if the database is active on one of the servers the move request succeeds. If the database is active on the snarky server it fails.

If i run

Get-MoveRequest theuseralias | Get-MoveRequestStatistics -IncludeReport

$stats.report.Failures | group FailureType | fl

I get

Name : BigFunnelTransientException

Count : 1

Group : {BigFunnelTransientException: Connection to the Content Transformation Service has failed.}

Values : {BigFunnelTransientException}

If i run

$stats.report.Failures[0]

I get the following...

Timestamp         : 12/1/2023 2:24:46 PM
FailureType       : BigFunnelTransientException
FailureHash       : b037
FailureCode       : -2146233088
MapiLowLevelError : 0
FailureSide       : Target
FailureSideInt    : 2
ExceptionTypes    : {Exchange, Transient, BigFunnelTransient}
ExceptionTypesInt : {1, 2, 910}
WorkItem          : WriteFolderMessages
Message           : Connection to the Content Transformation Service has failed.
MessageData       : 
DataContext       : --------
                    Operation: IMapiFxProxy.ProcessRequest
                    OpCode: TransferBuffer
                    DataLength: 31680
                    --------
                    Operation: IMapiFxProxy.ProcessRequest
                    Operation: IMapiFxProxy.ProcessRequest
                    OperationSide: Target
                    e10de667-e671-493e-82db-7b44ccc263ce (Primary)
                    OpCode: TransferBuffer
                    DataLength: 31680
                    --------
                    Operation: IMailbox.ExportMessages
                    Operation: IMailbox.ExportMessages
                    OperationSide: Source
                    e10de667-e671-493e-82db-7b44ccc263ce (Primary)
                    Flags: SkipItemValidation
                    PropTags: (null)
                    --------
                    >>>> Scheduled WorkItems: CreateFolderHierarchy(P:0,R:0,S:0,C:3007); CatchupFolders(P:0,R:0,S:0,C:758); 
                    InitializeCopyMessageStatistics(P:0,R:0,S:1,C:86); EnumerateFolders(P:0,R:0,S:0,C:67); EnumerateFolderMessages(P:67,R:0,S:0,C:15); 
                    WriteFolderMessages(P:1,R:0,S:0,C:2119); EnumerateFolderMessages(P:2202,R:0,S:0,C:13); 
                    EnumerateFolderMessages(P:2215,R:0,S:0,C:11,Cnt=19)
DataContextData   : 
StackTrace        :    at Microsoft.Exchange.Search.BigFunnel.OnSaveFeeder.PoiCreatorClient.CreatePoi(ICoreItem coreItem, IIngestionStatistics 
                    ingestionStatistics)
                       at Microsoft.Exchange.Search.BigFunnel.OnSaveFeeder.ContentIndexingSession.AddContentIndexingPropertiesTo(ItemOperation 
                    operation, ICoreItem coreItem)
                       at Microsoft.Exchange.Search.BigFunnel.OnSaveFeeder.ContentIndexingSession.ProcessItem(ItemOperation operation, ICoreItem 
                    coreItem)
                       at Microsoft.Exchange.Data.Storage.OnSaveAgent.BigFunnelItemAssistant.ProcessItem(IItemAssistantContext context)
                       at Microsoft.Exchange.Assistants.ItemAssistantRuntime.<>c__DisplayClass12_2.<Process>b__2(ItemAssistantInfo info, 
                    IItemAssistantContext context)
                       at Microsoft.Exchange.Assistants.OnSaveExceptionHandling.HandleExceptionInCatch(ItemAssistantInfo assistantInfo, 
                    IItemAssistantContext context, Action`2 action, Action`4 onSaveAgentActionCompleted)
                       at Microsoft.Exchange.Assistants.ItemAssistantRuntime.Process(IItemAssistantContext executionContext)
                       at Microsoft.Exchange.Assistants.ItemAssistantRuntime.Process(ItemOperation operation, StoreId itemId, ICoreItem item)
                       at Microsoft.Exchange.Data.StoreObjects.Extensibility.InlineEvent.EventDispatcher.<>c__DisplayClass4_1`1.<Dispatch>b__0()
                       at Microsoft.Exchange.Data.StoreObjects.Extensibility.InlineEvent.EventDispatcher.Dispatch[TEvent](TEvent eventData)
                       at Microsoft.Exchange.Data.Storage.CoreItem.InternalFlush(SaveMode saveMode, CoreItemOperation operation, OperationContext 
                    operationContext)
                       at Microsoft.Exchange.Data.Storage.CoreItem.Flush(SaveMode saveMode, OperationContext operationContext, CoreItemOperation 
                    operation, Boolean resetBodyFormat)
                       at Microsoft.Exchange.RpcClientAccess.Handler.StorageObjects.ItemWrapper.Flush(SaveMode saveMode)
                       at Microsoft.Exchange.RpcClientAccess.FastTransfer.Handler.MessageAdaptor.SetLongTermId(StoreLongTermId longTermId)
                       at Microsoft.Exchange.RpcClientAccess.FastTransfer.Parser.FastTransferMessage.<Microsoft-Exchange-RpcClientAccess-FastTransfer-IF
                    astTransferProcessor<Microsoft-Exchange-RpcClientAccess-FastTransfer-Parser-FastTransferUploadContext>-Process>d__10.MoveNext()
                       at Microsoft.Exchange.RpcClientAccess.FastTransfer.FastTransferStateMachine.Step()
                       at Microsoft.Exchange.RpcClientAccess.FastTransfer.Parser.FastTransferContext`1.Process(TDataInterface dataInterface)
                       at Microsoft.Exchange.RpcClientAccess.FastTransfer.Parser.FastTransferUploadContext.Process(IFastTransferReader dataInterface)
                       at Microsoft.Exchange.RpcClientAccess.FastTransfer.Parser.FastTransferUploadContext.PutNextBuffer(ArraySegment`1 buffer)
                       at Microsoft.Exchange.MailboxReplicationService.StorageFxProxy`1.Microsoft.Mapi.IMapiFxProxy.ProcessRequest(FxOpcodes opCode, 
                    Byte[] data)
                       at Microsoft.Exchange.MailboxReplicationService.FxProxyBudgetWrapper.Microsoft.Mapi.IMapiFxProxy.ProcessRequest(FxOpcodes 
                    opCode, Byte[] request)
                       at Microsoft.Exchange.MailboxReplicationService.ExecutionContext.Execute(Action operation)
                       at Microsoft.Exchange.MailboxReplicationService.ExecutionContextWrapper.Execute(Action operation, Boolean measure)
                       at Microsoft.Exchange.MailboxReplicationService.ExecutionContext.Execute(Action operation)
                       at Microsoft.Exchange.MailboxReplicationService.ExecutionContextWrapper.Execute(Action operation, Boolean measure)
                       at Microsoft.Exchange.MailboxReplicationService.FxProxyPoolFxCallbackWrapper.FolderProxyFxCallbackWrapper.Microsoft.Mapi.IMapiFxP
                    roxy.ProcessRequest(FxOpcodes opCode, Byte[] request)
                       at Microsoft.Exchange.MailboxReplicationService.BufferedReceiver.Microsoft.Exchange.MailboxReplicationService.IDataImport.SendMes
                    sage(IDataMessage message)
                       at Microsoft.Exchange.MailboxReplicationService.RemoteDataExport.ExportRoutine(IMailboxReplicationProxyService mrsProxy, Int64 
                    dataExportHandle, IDataImport destProxy, DataExportBatch firstBatch, Boolean useCompression)
                       at Microsoft.Exchange.MailboxReplicationService.RemoteMailbox.Microsoft.Exchange.MailboxReplicationService.IMailbox.ExportMessage
                    s(List`1 messages, IFxProxyPool proxyPool, ExportMessagesFlags flags, PropTag[] propsToCopyExplicitly, PropTag[] excludeProps)
                       at Microsoft.Exchange.MailboxReplicationService.MailboxWrapper.<>c__DisplayClass49_0.<Microsoft.Exchange.MailboxReplicationServic
                    e.IMailbox.ExportMessages>b__0()
                       at Microsoft.Exchange.MailboxReplicationService.ExecutionContext.Execute(Action operation)
                       at Microsoft.Exchange.MailboxReplicationService.ExecutionContextWrapper.Execute(Action operation, Boolean measure)
                       at Microsoft.Exchange.MailboxReplicationService.MailboxWrapper.Microsoft.Exchange.MailboxReplicationService.IMailbox.ExportMessag
                    es(List`1 messages, IFxProxyPool destProxies, ExportMessagesFlags flags, PropTag[] propsToCopyExplicitly, PropTag[] excludeProps)
                       at Microsoft.Exchange.MailboxReplicationService.MapiUtils.ExportMessageBatch(IMailbox mailbox, List`1 messages, Func`1 
                    getProxyPool, ExportMessagesFlags flags, PropTag[] propsToCopyExplicitly, PropTag[] excludeProps, EntryIdMap`1 
                    transientFailuresMap, TestIntegration testIntegration, Exception& failure, ItemPropertiesBase perBatchSettings)
                       at Microsoft.Exchange.MailboxReplicationService.MapiUtils.ExportMessagesWithBadItemDetection(IMailbox mailbox, List`1 messages, 
                    Func`1 getProxyPool, ExportMessagesFlags flags, PropTag[] propsToCopyExplicitly, PropTag[] excludeProps, TestIntegration 
                    testIntegration, List`1 badMessages, EntryIdMap`1 transientFailuresMap)
                       at 
                    Microsoft.Exchange.MailboxReplicationService.MailboxCopierBase.<>c__DisplayClass323_0.<CopyMessageBatchInternal>b__0(MessageRec[] 
                    subBatch)
                       at Microsoft.Exchange.MailboxReplicationService.MailboxCopierBase.CopyMessageBatchInternal(List`1 batch, MailboxChanges 
                    mailboxChanges, Int32 batchSize, MailboxUpdates mailboxUpdates, Int32& newMessages, Int32& changed, Int32& itemsCopied, ExDateTime& 
                    dtLastMessage)
                       at Microsoft.Exchange.MailboxReplicationService.MailboxCopierBase.CopyMessageBatch(List`1 batch, MailboxChanges mailboxChanges)
                       at Microsoft.Exchange.MailboxReplicationService.MoveBaseJob.WriteFolderMessages(MailboxCopierBase mailboxToWriteMessages, 
                    FolderStateSnapshot fss, Queue`1 writeQueue)
                       at Microsoft.Exchange.MailboxReplicationService.MrsSystemTask.<Run>b__17_2()
                       at Microsoft.Exchange.MailboxReplicationService.ExecutionContext.Execute(Action operation)
                       at Microsoft.Exchange.MailboxReplicationService.MrsSystemTask.<Run>b__17_0()
                       at Microsoft.Exchange.MailboxReplicationService.CommonUtils.ProcessKnownExceptionsWithoutTracing(Action actionDelegate, 
                    FailureDelegate processFailure)
InnerException    : 
UnknownElements   : 
UnknownAttributes :

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Exchange 2016 to 2019 On-Prem arbitration mailbox fails BigFunnelTransientException

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Your answer