There are lots of great blogs out there on how to do the overall migration of Public folders from previous versions of Exchange to 2013, but few of them detailed how to deal with a few choice issues that I encountered in a recent migration that I performed. For a good, detailed, checklist of how to do the migration, see any of the following: http://exchangeserverpro.com/exchange-server-2010-2013-migration-moving-public-folders/ http://blogs.technet.com/b/meamcs/archive/2013/07/25/part-4-step-by-step-exchange-2007-to-2013-migration.aspx http://www.msexchange.org/articles-tutorials/exchange-server-2013/migration-deployment/migrating-public-folders-exchange-2013-part1.html My migration was for 50,000 folders, and about 130GB of data. The issues that I ran into were (but not limited to): Needing a System Attendant mailbox on each server hosting Public Folders Spaces at the end of the names of fold...