Exchange 2010 Retention Policies

I understand that the retention period for a user's Deleted Items is set at the database level using the -RetainDeletedItemsFor object. For example, this value for Database1 is set at 60.00:00:00.

If I create a retention policy and retention tag that should remove Deleted Items after 45 days then assign that policy to an individual user (the mailbox exists in Database1), which takes precedence?

Here's my testing parameters: After assigning the 45 day policy to the a test user I issue this command:

   Start-ManagedFolderAssistant -Identity

I then perform a Get-Mailbox command to verify that the 45 day retention policy has been assigned to the TestUser's mailbox (it has). Yet the number of messages in the TestUser's Deleted Items folder does not change (a couple of hundred messages have dates greater than 45 days ago and should have been removed).

What am I missing?
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The 60 days doesn't apply to retention policy rather the database store.
SnakeEyedMojoAuthor Commented:
Does that mean the individual's policy trumps the value applied to the database store?
it adds to it,

Eg: Mine is set to 30 days (-RetainDeletedItemsFor ) and retention policy tag for deleted items is set to 90 (Delete and Allow recovery)

Effectively I have 120 days to recover deleted items from a user mailbox..
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SnakeEyedMojoAuthor Commented:
When do the number of messages in a user's Deleted Items folder actually become less?
After 30 days?
After 90 days?
After 120 days?
In your example, I understand it to be after 120 days.

Also, based upon your reply, if a user hasn't had a retention policy issued against their mailbox, then the value assigned to database where their mailbox is located is used. Is this correct?
it will be removed from the User delete items folder after 30 days and moved to the dumpster..

The value assign to the mailbox store will hold deleted items for the period specified, and triggered when a mail item is deleted (irrespective of folder)

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SnakeEyedMojoAuthor Commented:
Thank you. I've waded through Microsoft articles for a couple days and still hadn't understood what you've made perfectly clear in just a few short sentences.
SnakeEyedMojoAuthor Commented:
Quick, precise, and accurate answers like this one from LibranDragon is why I subscribe to Experts Exchange.
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