Exchange 2013 Migration Public Folders

I am in the middle of a migration from 2007 to 2013.  I have a total of 300 mailboxes and have successfully moved about 50% of them so far.

I plan on leaving the 2007 server up and running for a couple of weeks without any mailboxes on it so users Outlook and Active Sync phones will automatically connect to the new 2013 server.

My question is can I begin the Public Folder Migration piece while the mailboxes are still moving to the new server, or do I need to wait until ALL mailboxes have been successfully migrated?

I have been using this walk through for the migration:
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Simon Butler (Sembee)ConsultantCommented:
You can start the migration during the move mailbox stage, because you cannot start using public folders on Exchange 2013 until you have all mailboxes on the new platform. It is a cut stage, not mixed.

BSModlinAuthor Commented:
Ok, so to be clear... It is perfectly fine to migrate the PFs while the mailbox moves are still in progress.

If so, do you know of a good walk through to migrate the public folders?  I have used the link above before and it did not go well.......
Simon Butler (Sembee)ConsultantCommented:
You have seen the official TechNet guide on the process?


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