New-MailboxExportRequest remains "queued" at 0%

Question

Greetings, my mailbox exports are going into "queued" status, and remain at 0% complete even after many hours.
This is occurring on every mailbox which we've tried to export (about a dozen so far), and they are scattered across all 16 of our DBs.
It was working fine in December, and we've been trying for months to find out why it stopped working.
The environment is 2x CAS/HT front-ended by an F5 appliance, and a two-member DAG with a FSW.  All servers are at Exchange 2010 SP3 RU5.
This is my command line:
New-MailboxExportRequest -verbose -Mailbox '<<mailboxname>>' -Name '<<exporttaskname>>' -BadItemLimit 999 -AcceptLargeDataLoss -ExcludeDumpster -FilePath '\\<<fqdn>>\Mailbox-Exports\<<filename>>.pst'
Which results in this ---
[PS] C:\>Get-MailboxExportRequest | Get-MailboxExportRequestStatistics
Name Status SourceAlias PercentComplete
<<mailboxname>> Queued <<exporttaskname>> 0
...and the value in the PercentComplete does not increment, even when hours have passed.
MAPI is enabled on the mailbox.  All of the DBs are mounted or healthy.  We've rebooted all of the servers. We've restarted the replication service on all the servers. We've made sure the "MRSConfiguration" settings in MSExchangeMailboxReplication.exe.config
are at their defaults.  There's nothing odd in the system or application logs.
Here are the results of a status check ...
[PS] C:\>Get-MailboxExportRequest | Get-MailboxExportRequestStatistics |fl
RunspaceId : bef8d2d9-4c7c-4dad-85c0-b7d4a6f4b5c1
Name : <<mailboxname>>
Status : Queued
StatusDetail : Queued
SyncStage : None
Flags : IntraOrg, Push
RequestStyle : IntraOrg
Direction : Push
Protect : False
Priority : Normal
Suspend : False
FilePath : \\<<fqdn>>\Mailbox-Exports\<<filename>>.pst
SourceAlias : <<mailboxname>>
SourceIsArchive : False
SourceExchangeGuid : 87945c65-ea8a-4a5c-808b-c35bb598d163
SourceRootFolder :
SourceVersion : Version 14.3 (Build 181.0)
SourceMailboxIdentity : <<ou+username>>
SourceDatabase : DB008
TargetRootFolder :
TargetVersion : Version 0.0 (Build 0.0)
IncludeFolders : {}
ExcludeFolders : {}
ExcludeDumpster : True
ConflictResolutionOption : KeepSourceItem
AssociatedMessagesCopyOption : DoNotCopy
BatchName :
ContentFilter :
ContentFilterLanguage :
BadItemLimit : 999
BadItemsEncountered :
QueuedTimestamp : 4/1/2014 10:57:02 AM
StartTimestamp :
LastUpdateTimestamp : 4/1/2014 10:57:03 AM
CompletionTimestamp :
SuspendedTimestamp :
OverallDuration : 01:57:04
TotalSuspendedDuration :
TotalFailedDuration :
TotalQueuedDuration : 01:57:04
TotalInProgressDuration :
TotalStalledDueToHADuration :
TotalTransientFailureDuration :
MRSServerName :
EstimatedTransferSize : 0 B (0 bytes)
EstimatedTransferItemCount : 0
BytesTransferred :
BytesTransferredPerMinute :
ItemsTransferred :
PercentComplete : 0
PositionInQueue : 7/7 (Position/Queue Length)
FailureCode :
FailureType :
FailureSide :
Message :
FailureTimestamp :
FailureContext :
IsValid : True
ValidationMessage :
OrganizationId :
RequestGuid : e60a43ca-a6de-438c-84b7-25a65c3ad26d
RequestQueue : DB008
Identity : RequestGuid (e60a43ca-a6de-438c-84b7-25a65c3ad26d), RequestQueue: (e90cea03-d8da-4870-b
1f9-95afcf6d2038)
Report :
[PS] C:\>
Has anyone else run into this problem and been unable to resolve it?

Answer 1

[PS] C:\Windows\system32>New-MailboxExportRequest -Verbose -Mailbox '**mailbox**' -Name '**exportrequest**' -BadItemLimit 999 -AcceptLargeDataLoss -ExcludeDumpster -FilePath '\\**fqdn**\Mailbox-Exports\**mailbox**.pst'
VERBOSE: [15:20:59.458 GMT] New-MailboxExportRequest : Active Directory session settings for 'New-MailboxExportRequest'
are: View Entire Forest: 'True', Configuration Domain Controller: '**fqdn**', Preferred
Global Catalog: '**fqdn**', Preferred Domain Controllers: '{
**fqdn** }', User Preferred Global Catalog: '**fqdn**', Preferred
Domain Controllers: '{ **fqdn** }'
VERBOSE: [15:20:59.473 GMT] New-MailboxExportRequest : Runspace context: Executing user: **domain**/Admin
Accounts/Admin **ME!**, Executing user organization: , Current organization: , RBAC-enabled: Enabled.
VERBOSE: [15:20:59.473 GMT] New-MailboxExportRequest : Beginning processing &
VERBOSE: [15:20:59.473 GMT] New-MailboxExportRequest : Instantiating handler with index 0 for cmdlet extension agent
"Admin Audit Log Agent".
WARNING: When an item can't be read from the source location or can't be written to the target location, it will be
considered corrupted. By specifying a non-zero BadItemLimit, you're requesting that Exchange not copy such items to the
target location. When the request is complete, such corrupted items won't be available at the target. When the source
is deleted, these items will be completely lost.
VERBOSE: [15:20:59.567 GMT] New-MailboxExportRequest : Current ScopeSet is: { Recipient Read Scope: {{, }}, Recipient
Write Scopes: {{, }}, Configuration Read Scope: {{, }}, Configuration Write Scope(s): {{, }, }, Exclusive Recipient
Scope(s): {}, Exclusive Configuration Scope(s): {} }
VERBOSE: [15:20:59.614 GMT] New-MailboxExportRequest : Searching objects "**mailbox**" of type "ADUser" under the
root "$null".
VERBOSE: [15:20:59.614 GMT] New-MailboxExportRequest : Previous operation run on global catalog server
'**fqdn**'.
VERBOSE: [15:20:59.629 GMT] New-MailboxExportRequest : Rereading object "**domain**/**ou**/**ou**/**account**" of type "ADUser" under the root "CN=**account**,OU=**ou**,OU=**ou**,DC=**domain**,DC=COM".
VERBOSE: [15:20:59.629 GMT] New-MailboxExportRequest : Previous operation run on domain controller
'**fqdn**'.
VERBOSE: [15:20:59.645 GMT] New-MailboxExportRequest : Searching objects "DB008" of type "MailboxDatabase" under the
root "$null".
VERBOSE: [15:20:59.645 GMT] New-MailboxExportRequest : Previous operation run on domain controller
'**fqdn**'.
VERBOSE: [15:20:59.692 GMT] New-MailboxExportRequest : [DEBUG] MDB e90cea03-d8da-4870-b1f9-95afcf6d2038 found to belong
to Site: **domain**/Configuration/Sites/**site**
VERBOSE: [15:20:59.692 GMT] New-MailboxExportRequest : [DEBUG] MRSClient: attempting to connect to
'**cas**.**domain**'
VERBOSE: [15:20:59.739 GMT] New-MailboxExportRequest : [DEBUG] MRSClient: connected to '**cas**.**domain**',
version 14.3.178.0 caps:07
VERBOSE: [15:20:59.785 GMT] New-MailboxExportRequest : Processing object "RequestGuid
(492b4d0c-1982-4f94-b7c5-603c5383cdcf), RequestQueue: (e90cea03-d8da-4870-b1f9-95afcf6d2038)".
VERBOSE: [15:21:00.565 GMT] New-MailboxExportRequest : Admin Audit Log: Entered Handler:Validate.
VERBOSE: [15:21:00.565 GMT] New-MailboxExportRequest : Admin Audit Log: Exited Handler:Validate.
VERBOSE: Creating mailbox export request 'RequestGuid (492b4d0c-1982-4f94-b7c5-603c5383cdcf), RequestQueue:
(e90cea03-d8da-4870-b1f9-95afcf6d2038)'.
VERBOSE: [15:21:00.581 GMT] New-MailboxExportRequest : Resolved current organization: .
VERBOSE: [15:21:00.581 GMT] New-MailboxExportRequest : [DEBUG] 4/3/2014 10:20:59 AM [**cas**]
'**domain**/Admin Accounts/Admin **ME!**' created request.
VERBOSE: [15:21:00.597 GMT] New-MailboxExportRequest : [DEBUG] 4/3/2014 10:20:59 AM [**cas**]
'**domain**/Admin Accounts/Admin **ME!**' allowed a large amount of data loss when moving the mailbox (999 bad items).
VERBOSE: [15:21:00.612 GMT] New-MailboxExportRequest : Saving object "RequestGuid
(492b4d0c-1982-4f94-b7c5-603c5383cdcf), RequestQueue: (e90cea03-d8da-4870-b1f9-95afcf6d2038)" of type
"TransactionalRequestJob" and state "New".
VERBOSE: [15:21:00.643 GMT] New-MailboxExportRequest : [DEBUG] Updating Index/ADUser data for RequestJob 'RequestGuid
(492b4d0c-1982-4f94-b7c5-603c5383cdcf), RequestQueue: (e90cea03-d8da-4870-b1f9-95afcf6d2038)'.
VERBOSE: [15:21:00.815 GMT] New-MailboxExportRequest : Previous operation that ran on:
'**fqdn**'.
VERBOSE: [15:21:00.815 GMT] New-MailboxExportRequest : Reading new object "RequestGuid
(492b4d0c-1982-4f94-b7c5-603c5383cdcf), RequestQueue: (e90cea03-d8da-4870-b1f9-95afcf6d2038)" of type
"TransactionalRequestJob".
VERBOSE: [15:21:00.862 GMT] New-MailboxExportRequest : Previous operation that ran on:
'**fqdn**'.
Name Mailbox Status
**mailbox** **domain**/**ou**/**ou** Queued
VERBOSE: [15:21:00.971 GMT] New-MailboxExportRequest : Admin Audit Log: Entered Handler:OnComplete.
VERBOSE: [15:21:00.987 GMT] New-MailboxExportRequest : Admin Audit Log: Exited Handler:OnComplete.
VERBOSE: [15:21:01.002 GMT] New-MailboxExportRequest : Ending processing &
[PS] C:\Windows\system32>