One or more mailboxes have been disabled for synchronizing appointments, contacts, and tasks because an error occurred while ...

One or more mailboxes have been disabled for synchronizing appointments, contacts, and tasks because an error occurred while connecting to the Microsoft Exchange server. Make sure that the Microsoft Exchange server is reachable and the services on Microsoft Exchange server are running. Then, enable the mailboxes for synchronizing appointments, contacts, and tasks. For more information, open the associated email server profile {0}.