Migrated to Exchange 13 from Exchange 2007. The client did not use public folders at all so they were just deleted. (Could not use the various PS command / cleanup / mount emtpy db methods so had to resort to the adsiedit and remove the PF db from there).
Anyway.. migration is complete and Exchange 07 is gone. Seeing these errors in Event Log now for Exchange 2013. What is the proper way to clean this up? Public Folders are not in use at all.