I have a client that has a hosted Exchange 2013 environment in a data center. They have decided to leave that data center and move to another data center that we run. I have recreated the entire AD structure and a new instance of Exchange 2013. Below are the details

old data center - One server with exchange 2013 running as the cas and store

New data center - 2 Servers - 1 as Cas, other as Store

All recipient mailboxes have been exported from old server to and imported into new server

They have 2 public mailboxes that have been created that both hold a number of public folders inside of them. I need to find a way to export these 2 public mailboxes (while keeping the folder structure) and then import them into the new Store. All i seem to find is how to migrate from exchange 2003, or 2010. There is no documentation on moving from one 2013 instance to another. Does anyone have any suggestions at all. I am very familiar with Powershell and scripting just need to know the commands to to the export and imports. 

Hi,

According to your description, I understand that you want to migrate public folder cross-forest for Exchange 2013.
If I misunderstand your concern, please do not hesitate to let me know.

We can use Outlook to move public folder content and hierarchy, for your reference:
https://social.technet.microsoft.com/Forums/exchange/en-US/c3f6692e-58e6-4978-a984-90751e40e5e7/cross-forest-exchange-2007-to-exchange-2010-public-folder-migration?forum=exchange2010
Also, please refer to: http://blogs.technet.com/b/exchange/archive/2011/03/28/iorepl-and-exchange-2010-sp1.aspx

Thanks

Here is an informative technet library that should be a good start-up while need to move public folders in 2013 cross-forest : https://technet.microsoft.com/en-us/library/jj906434%28v=exchg.150%29.aspx

If you want to proceed this job automatically, this available application (http://www.exchangemigrationtool.com/) could be a good alternative choice for you.