KB3118374 Breaking SharePoint Online Calendar and Task Sync to Outlook
UPDATE – This issue is reportedly fixed with the January Office patches. See https://support.microsoft.com/en-us/kb/3141473 for details. Thanks to Janis for pointing this out! After installation of KB3118374, users that have sync’d calendars and\or task lists from SharePoint Online to their local install of Outlook 2016 are experiencing authentication errors. Symptoms are a popup that reads “The server you […]