Exchange 2013 Powershell - clean up Deleted Items folder based on date


Our company has the unfortunate luck of being around for 10+ years with no real limits on mailbox sizes. I have multiple Deleted Items folders with 15k+ mail pieces in them. My understanding is that if I apply the Retention Policy to those folders now, to let's say wipe items older than 1 year, since this is the first time retention tags would get applied, the first items would get deleted one year from now (unless I am mistaken here), instead of wiping right away any items that were already deleted over a year ago...

My idea was to set those tags, but in the meantime, come up with a PS script that would be run against most offending mailboxes to wipe the excess mail pieces to get us by till the Retention Policies start working their magic.

Has anyone ever attempted running such script? I have seen several ideas on line, but all the forums report mixed results... Is there another tool I could use to selectively/administratively  wipe emails from few folders in other mailboxes, short of doing it from each user's Outlook?
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Will SzymkowskiSenior Solution ArchitectCommented:
You can use the below script do to this for either a single user or all users...

Single User
Search-Mailbox -Identity user1-SearchQuery '#deleted items#' -DeleteContent

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For All User Mailboxes
$Mailboxes = get-mailbox -resultsize "unlimited"
ForEach ($M in $Mailboxes)
                Search-Mailbox -Identity $m.UserPrincipalName -SearchQuery '#Deleted Items#' -DeleteContent -Confirm:$false


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rr2rAuthor Commented:
Is there a way to make it run against emails older than a year let's say?
Will SzymkowskiSenior Solution ArchitectCommented:
You can try the below for this.

Search-Mailbox -Identity user1-SearchQuery '#deleted items# and Received:>("12/31/2014")' -DeleteContent

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rr2rAuthor Commented:
I tried your suggestions and I got an error back from PS. It was last week so I have no recollection of the error but I will work on this hopefully tomorrow or Wednesday. I secured access to old mailbox that I can test on so hopefully we can figure this out.
rr2rAuthor Commented:
The last example did not seem to do anything, although it did complete the run. Going to do some more testing.

Searching online is seems that the Search-Mailbox cannot be targeted at a specific folder as for example described here:
rr2rAuthor Commented:
I ended up working with the user and created a secondary profile on a different machine to help him with the cleaning. The script above were not specific enough, but I think they would work in different situations.
rr2rAuthor Commented:
Although it did not exactly what I wanted, I am sure someone could find it helpful.
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