Uncheck all the boxes and close Outlook.Under the Other options select Sync Services.Click on Preferences in the Outlook menu.Start Outlook in your system (if it opens).These could be the two reasons causing the error, solving these problems will fix the Outlook for Mac Sync Error Methods to Solve ‘Outlook for Mac Sync’ Issueįollow the steps mentioned below to solve Outlook 2016 Mac Sync problem Outlook for Mac sync cache has not been cleared.Synchronizations preferences settings are not properly configured.The main causes of Outlook Mac sync problem with Mac are To fix this error it is advised to clear the Outlook Mac cache. To update the files in OST and PST outlook perform synchronization but some users complain of Outlook for Mac error ‘Microsoft Sync Services has encountered a problem and needs to close’.We are sorry for the inconvenience’. Users can share calendars, notes, send/ receive emails on Outlook for Mac the same as MS Outlook. But that doesn’t mean we have compromised with the quality of products recommended, we have tested and reviewed the products mentioned below ourselves. Affiliate Disclosure: Some links mentioned below are affiliate links, we may earn a small amount if you make a purchase at no additional cost to you.