I have just recently migrated from Exchange 2010 to Exchange 2013. This included the migration of Public Folders. All data for the Public Folders appeared to come across with no issues and access is no issue either.
After a couple of days we started receiving SD calls advising staff are unable to edit/delete their own public folder calendar entries, it also shows "(Read Only)" in the title. They are have Author permissions on the folder and can create new items.
I have tried to delete and re-add permissions, but the only thing that resolves the issue is to grant Editor or higher permissions, which is not an answer for us.
Any feedback would be greatly welcomed.
Cheers,
Damian