Exchange 2010 sp3 ru1 - move mailbox to different database get warning

I have 2 CAS and 2 DAG Exchange 2010 SP3 RU2 and every time I move a mailbox to another exchange database I get the below error...

Warning: Failed to clean up the source mailbox after the move.

Error details: MapiExceptionUnexpectedMailboxState: Unable to delete mailbox. (hr=0x80004005, ec=2634)


I found how to fix it maunaly  -> http://www.blackforce.co.uk/2013/04/06/exchange-move-request-error-failed-to-clean-up-the-source-mailbox-after-the-move

How come this is still happening? Anyone know of a permanent fix?

Thanks!
EncinitasAsked:
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Mohammed TahirMicrosoft Exchange and O365 AdministratorCommented:
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Praveen BalanSolution ArchitectCommented:
the  expected behavior is disconnected state without a warning message, the status of the source DB mailbox will become soft deleted.

The cleanup will happen automatically according to the deletion retention period settings on database properties, and hence you can ignore the above error.

There is no concrete solution yet seen, though it was said to be resolved by applying many roll ups in the past.

I suggest you to follow the purge option mentioned by you, in case if you wish to gain the white space on database immediately. Otherwise leave it.

-Praveen
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