I built a test environment in preparation for a migration I am doing. I have a 2007 and 2013 set up.
After I moved the test users from the 2007 exchange server to the 2013 server, they can no longer open the public folders still in the 2007 environment. The error is "the server mailbox cannot be opened because this address book entry is not a mail user.".
The Public Folders will eventually be migrated, but I want to ensure users will still have access to them as they are migrated. What step am I missing?