The ability to share a secondary calendar without having to share a primary calendar.Consistent sharing permissions that matches the other modern Outlook clients (Outlook mobile, Outlook on the web, Outlook for Windows).When migrated to the new calendar syncing model, customers should expect to experience the following improvements As a result of this upgrade, Outlook for Mac will now use the server-roamed list of calendars.įor more information about shared calendar improvements across Outlook, please see this article. In the past, the list of shared calendars was previously stored locally for each installation of Mac Outlook. These changes will bring improved reliability and performance of calendar sharing in Outlook for Mac based on the use of REST technology. We're introducing a new syncing model for sharing calendars in Outlook for Mac for Office for Mac Insider Fast. We’re excited to announce that Outlook for Mac will soon start syncing calendars via REST for Office 365 customers in the Insider Fast program.