We've been given a retention hold by legal on some of our Exchange backup data. 
 I need to retain a portion of it, but not all of it.  Any strategies to do 
this?

Specifics:
TSM For Mail For Exchange 2010 version 6.3.0.01
Exchange 2010 is DAG configured, but the backups are not DAG intelligent like 
6.4.0 would be.
TSM Server Version 6.3.3.0
Default retention is 14 days.  I only need to retain day 10 to 14.
LTO4, LTO5, and FILE Devclasses available

My immediate guess, since backupsets don't necessarily work for VSS backups (I 
read that somewhere), is to do an export to sequential media of the data using 
fromdate, todate parameters.  In order to retrieve the data, I have a standby 
6.3 server I can import into, I suppose.  A lot of work that way.  But will 
this work?  I'll need to ensure the target domain has forever retention 
parameters, but will the data bind correctly when I import?

Thanks!
Sergio