I have three Exchange 2013 DAGs in three different sites.  The three DAGs can communicate with each other fine but not necessarily the users in the sites.  Users in Site A can communicate with the Dags in Site B and Site C.  Users in Site B can only communicate with the DAG in Site A and Site B.  Users in Site C can only communicate with the DAG in Site A and Site C.

I want the site specific public folders to live in a public folder mailbox on their local DAG.  My questions are as follows:

1. If a user in Site A had rights to every public folder in all public folder mailboxes would all of the Public Folders show in Outlook for them?

2. What's the best method of migrating from Exchange 2007 PFs to this?  Can I map certain Public Folders to certain PF Mailboxes?

Thanks.

1.  They should, yes.

2.  Yes, you can.  There are migration scripts you download, and after you run the script, you can change the folder-to-mailbox mapping to suit your needs.  The process is pretty intuitive.