For how many years has Microsoft said that public folders were going to be removed in future releases of Exchange? I don't know for sure. What I know is that the public folders are here to stay; at least they remain in Exchange 2016. Microsoft got rid of the public folder database and, therefore, the public folder replication as well. The legacy public folder architecture has now been replaced, and starting in Exchange 2013, the public folder mailbox was introduced.
This also means that we now have the availability to use a Database Availability Group (DAG) to replicate the public folder mailboxes between servers, just like normal mailboxes.
In this recipe, we are going to create a structure of public folders and finally, mail-enable one of them.