One or more mailboxes associated to the email server profile {0} have been disabled for synchronizing appointments, contacts, ...

One or more mailboxes associated to the email server profile {0} have been disabled for synchronizing appointments, contacts, and tasks because a server certificate that is required to connect to the Microsoft Exchange server using SSL couldn't be validated. Make sure that a valid certificate is installed for Microsoft Dynamics CRM to connect to the Microsoft Exchange server. Then, enable the mailboxes for appointments, contacts, and tasks synchronization.