I have a Macbook user that likes to use his computer to send iMessages from the messenger app. He is currently using Office 365 for email and to sync his contacts with his Outlook on his PC and Macbook. The contacts within the message app though do not seem to reflect what is in his Office 365 account. Is there a process for syncing them? Or at least doing an Export/ Import once in a while to keep them somewhat up to date?