Question : Archive retention in exchange 2010

Pretty straight forward question... I haven't upgraded from 07 to 10 yet, but I'm wondering if its possible to set retention policies on already archived email.

For instance, if I have a separate dedicated archive database and I only want to keep email in those archives for less than 5 years. Is that an option? Thanks

Answer : Archive retention in exchange 2010

You cannot do that on Exchange 2010 RTM, but you can have a separate database for Archive folders in Exchange 2010 SP1

Ref:
http://www.shudnow.net/2010/04/07/exchange-2010-sp1-personal-archive-mailboxes-on-separate-databases/

How to set retention policy on Archives?> Use Retention Tags

New-RetentionPolicyTag "Tag-FIN-DeletedItems" -Type "DeletedItems" -Comment "Deleted Items are purged in 30 days" -RetentionEnabled $true -AgeLimitForRetention 30 -RetentionAction PermanentlyDelete

http://technet.microsoft.com/en-us/library/dd335174.aspx

I'd suggest give this a read @ Message Records Management (MRM), before going ahead and testing this.
http://technet.microsoft.com/en-us/library/bb123548.aspx

hth