Então, não havia realmente uma solução "simples". Os detalhes exatos permanecem sem solução.
O que fizemos foi configurar um novo Exchange 2010 Server em uma nova máquina (e, em boa medida, um controlador de domínio adicional em outra máquina nova) e mover as caixas de correio do Small Business Server para o Exchange. 2010.
Quando chegamos à caixa de correio problemática, ela se recusou a mover com a seguinte mensagem:
07.01.2013 19:01:07 [exchange-2010] Initializing folder hierarchy in mailbox 'Primary (76582dc1-1a82-428e-bd05-e1276800e425)': 105 folders total.
07.01.2013 19:01:17 [exchange-2010] Fatal error MapiExceptionPartialCompletion has occurred.
Error details: MapiExceptionPartialCompletion: Unable to copy to target. (hr=0x40680, ec=0)
at Microsoft.Mapi.MapiExceptionHelper.ThrowIfErrorOrWarning(String message, Int32 hresult, Boolean allowWarnings, SafeExInterfaceHandle iUnknown, Exception innerException)
at Microsoft.Mapi.MapiUnk.ThrowIfErrorOrWarning(String message, Int32 hr)
at Microsoft.Mapi.MapiProp.CopyTo(MapiProp destProp, Boolean reportProgress, CopyPropertiesFlags copyPropertiesFlags, Boolean copySubObjects, ICollection'1 excludeTags)
at Microsoft.Mapi.MapiProp.ExportObjectHelper(IMapiFxProxy dest, PropTag[] tags, CopyPropertiesFlags copyPropertiesFlags, Boolean useCopyProps)
at Microsoft.Mapi.MapiProp.ExportObject(IMapiFxProxy fxProxy, CopyPropertiesFlags copyPropertiesFlags, PropTag[] excludeTags)
at Microsoft.Exchange.MailboxReplicationService.LocalSourceFolder.Microsoft.Exchange.MailboxReplicationService.ISourceFolder.CopyTo(IFxProxy destFolderProxy, PropTag[] excludeTags)
at Microsoft.Exchange.MailboxReplicationService.SourceFolderWrapper.<>c__DisplayClass1.<Microsoft.Exchange.MailboxReplicationService.ISourceFolder.CopyTo>b__0()
at Microsoft.Exchange.MailboxReplicationService.ExecutionContext.Execute(GenericCallDelegate operation)
at Microsoft.Exchange.MailboxReplicationService.SourceFolderWrapper.Microsoft.Exchange.MailboxReplicationService.ISourceFolder.CopyTo(IFxProxy destFolder, PropTag[] excludeTags)
at Microsoft.Exchange.MailboxReplicationService.MailboxCopierBase.CopyFolderProperties(FolderRecWrapper folderRec, ISourceFolder sourceFolder, IDestinationFolder destFolder, FolderRecDataFlags dataToCopy)
at Microsoft.Exchange.MailboxReplicationService.MoveBaseJob.<>c__DisplayClass36.<>c__DisplayClass38.<CreateFolderHierarchy>b__31()
at Microsoft.Exchange.MailboxReplicationService.ExecutionContext.Execute(GenericCallDelegate operation)
at Microsoft.Exchange.MailboxReplicationService.MoveBaseJob.<>c__DisplayClass36.<CreateFolderHierarchy>b__30(FolderRecWrapper folderRec, EnumFolderContext context)
at Microsoft.Exchange.MailboxReplicationService.FolderMap.EnumSingleFolder(FolderRecWrapper folderRec, EnumFolderContext ctx, EnumFolderCallback callback, EnumHierarchyFlags flags)
at Microsoft.Exchange.MailboxReplicationService.FolderMap.EnumSingleFolder(FolderRecWrapper folderRec, EnumFolderContext ctx, EnumFolderCallback callback, EnumHierarchyFlags flags)
at Microsoft.Exchange.MailboxReplicationService.FolderMap.EnumSingleFolder(FolderRecWrapper folderRec, EnumFolderContext ctx, EnumFolderCallback callback, EnumHierarchyFlags flags)
at Microsoft.Exchange.MailboxReplicationService.MoveBaseJob.<CreateFolderHierarchy>b__2f(MailboxMover mbxCtx)
at Microsoft.Exchange.MailboxReplicationService.MoveBaseJob.ForeachMailboxContext(MailboxMoverDelegate del)
at Microsoft.Exchange.MailboxReplicationService.MoveBaseJob.CreateFolderHierarchy(Object[] wiParams)
at Microsoft.Exchange.MailboxReplicationService.CommonUtils.CatchKnownExceptions(GenericCallDelegate del, FailureDelegate failureDelegate)
Error context: --------
Operation: ISourceFolder.CopyTo
OperationSide: Source
Primary (76582dc1-1a82-428e-bd05-e1276800e425)
PropTags: [ContainerContents; FolderAssociatedContents; ContainerHierarchy; RulesTable; 1071710466]
--------
Folder: '/Top of Information Store/Inbox', entryId [len=46, data=00000000B55449F4D13FC54AAA4A5936050753AE01005896698ABF45814BA7D90A6A0EA2FEAF00000000329A0000], parentId [len=46, data=00000000B55449F4D13FC54AAA4A5936050753AE01005896698ABF45814BA7D90A6A0EA2FEAF0000000032970000]
07.01.2013 19:01:18 [exchange-2010] Removing target mailbox 'Primary (76582dc1-1a82-428e-bd05-e1276800e425)' due to an offline move failure.
07.01.2013 19:01:18 [exchange-2010] Relinquishing job.
Nós consideramos isso como a evidência final de que realmente há algo muito errado com essa caixa de correio. Então, nós o apagamos no servidor antigo, criamos um novo e agora estamos copiando de volta todos os e-mails, entradas de calendário, contatos, anotações e itens necessários do Outlook.