Unlike earlier migrations where you could migrate Public Folders ahead of the users, in Exchange 2013 all of your users—who needs access to Public Folders—need to be moved to Exchange 2013 prior to moving the Public Folders. This because Exchange 2010 users cannot access Public Folders hosted on an Exchange 2013 server.
In order to execute the following steps, you need to access the Exchange Management Shell.
In this section we will cover the tasks related to Public Folders:
In this first step, we'll gather some statistics about the existing Public Folders. This information will allow us to later on verify whether all existing data was copied over ...