remove disconnected mailboxes from Exchange

Greets
I would like to be able to remove disconnected mailboxes from Exchange
I have already backed up their mails in a PST file on a storage HD, so I do not need the mailboxes in their entirety. FYI - users are no longer in the AD.
I estimate that this could free up close to 10 Gb of space. Can you help me with a Powershell command or other idea?
Thanks
tagltdAsked:
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R--RCommented:
Please confirm the Exchange version.
R--RCommented:
If you are using Exchange 2007 or 2010 then you can use the following article from http://theucguy.net written by Rajith Jose Enchiparambil.

http://theucguy.net/purge-disconnected-or-soft-deleted/
https://technet.microsoft.com/en-in/library/gg181092%28v=exchg.141%29.aspx
tagltdAuthor Commented:
Hi,
Sorry...forgot to mention. We are using Exchange 2010 Sp1
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Will SzymkowskiSenior Solution ArchitectCommented:
To permanetly delete mailboxes that are in a disconnected state you need to use the Remove-StoreMailbox cmdlet. I have also provided an example below...

$datebase = "DatabaseName"
Get-MailboxStatistics -Database $database |
? {$_.DisconnectReason -eq "SoftDeleted"} |
foreach {Remove-StoreMailbox -Database $_.database -Identity $_.mailboxguid -MailboxState SoftDeleted}

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Will.
AmitIT ArchitectCommented:
Exchange will automatically purge them after it reaches mailbox retention period. Just reduce the DB retention period for deleted mailbox. This way you can avoid manual work of deleting them. Or you can run remove-mailbox and clean-database command. I personally pefer to keep them until db retention period, in case you need to restore them for any reason.

Also note SP1 is no more supported by MS. Move to SP3 with RU8V2 or RU9. Follow my article for smooth upgrade.

http://www.experts-exchange.com/articles/10389/Steps-for-Upgrading-Exchange-2010-SP1-or-SP2-to-SP3-with-Latest-Rollup.html

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tagltdAuthor Commented:
Thanks all. I used a combination of reducing the mail retention period + manually removing the largest mail account. All good!
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