Active Manager failed to mount database Public Folder Database 1 on server MailServer1.arabia.sy. Error: An Active Manager operation failed. Error The database action failed. Error: Unable to mount database 'Public Folder Database 1'. The database appears to have been mounted at least once since its creation, but there is no database file at 'D:\Exchange 2010\Mailbox Database\Public Folder Database\Public Folder Database.edb'. Either recover the database file from a backup, or mount the database with a new, empty database by using the Mount-Database cmdlet with the -Force parameter..