Need Public Folder advice

Hi Guys,

I have a customer who has about 800 GB of public folder data on Exchange 2007. They are using EV just for mailbox archiving today.

Now, they want to move to Exchange 2013.

Question is... if it is better to archive PF on Exchange 2007 today or wait until after they have migrated to Exchange 2013?

Ref the limitations mentioned in this article: http://www.symantec.com/business/support/index?page=content&id=HOWTO83264

Thanks.

Gill