Unable to access Public Folders via Outlook or Outlook Web Access (OWA) after doing an Exchange switchover
-- Open the Exchange Management Console.
-- On right-hand side expand 'Organization configuration' and click 'Mailbox'. Select the Replica mailbox database(s) or store(s) and right-click and select properties.
-- Click 'Client setting tab' and see what is listed under 'Default public folder database'. It should display the Replica public folder database. If it doesn't list the Replica public folder database name you need to change it to the Replica's public folder database, to do this click the 'Browse' button and select the Replica public folder database from the list.
-- Once you have made sure the above step is followed correctly then do a full re-sync and then you can test the public folders again by doing a test switchover, you should now be able to access your public folders via Outlook as well as OWA.
Related articles :