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2003 to 2010 transition, remove undeleted 2003 mailboxes?

Posted on 2010-08-24
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I am at the last stages of a 2003 to 2010 exchange transition. All the mailboxes, public folders, etc have been moved to 2010. Address books have been updated and moved. The new server is authoritative for everything.

The public folder heirarchy has been moved to 2010 as well, and as there was no more messages to pass between the two environments, the 2003-2010 routing group connectors have been removed, and the recipient update service for 2003 has been deleted.

As I understand it, to properly remove 2003 I should uninstall it via add-remove next. I am not able to do that because Exchange thinks there are still some mailboxes on the 2003 storage group. These mailboxes were created successfully on the 2010 server during the transition but not all of them were auto-deleted.

I've attempted to dismount the store and remove the files but that it thinks there is still a mailbox on the store. If I try to purge the mailbox it tells me its already been reconnected...

Could anyone please clarify what I need to do for these junk mailbox files?

Much appreciated.
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Question by:SupA1
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by:sunnyc7
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Did you remove the routing group connectors from 2003 to 2010 (which you might have setup during migration ?)
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by:Seth Simmons
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If the uninstaller says mailboxes still exist and you can't see in ESM, then you need to do a query in AD and select Exchange Recipients.  Select users with Exchange Mailbox then on storage tab select 'mailboxes on this server' and put in the 2003 server.  See what it returns for results.
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by:Seth Simmons
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As far as the mailboxes on 2003 that have a red x and can't be purged, you can ignore those.

It queries AD for anything that has a mailbox properties with that 2003 server.  If it was just those, you can purge that mailbox store but it appears there is some other object configured to have a mailbox on that 2003 server that needs to be fixed first.
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by:SupA1
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So what should I do then to properly decomission the server if I can't do anything about the mailboxes with a red x? There was one mailbox without the red x which I believe was the system attendant account.
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by:Seth Simmons
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As I mentioned earlier, use ADUC to query for objects that have an attribute to use that 2003 server for mailbox location.  Since a mailbox won't show in ESM unless it's been accessed or mail delivered to it, there could have been something created but never used.

Ignore the system attendant as that needs to be there.  That is the only mailbox that should appear on the server when you try to uninstall.
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by:SupA1
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This answers my questions, problem solved -- thanks!
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by:sunnyc7
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Thanks for the points.
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