Another reason could be a problem with your PST file that doesn’t allow Office 365 calendar to sync with MS Outlook. And hence, Outlook can’t add the Calendar to its feature set. While most servers respond successfully by supporting these capabilities through modern authentication, some find it an invalid client request. If you are trying to access the Internet calendar file (when it doesn’t even require authentication), the current structure will store on the server. Microsoft Outlook 2016 and Outlook for Office 365 have adopted a modern way of authenticating tech stacks. Reasons behind the Calendar not Syncing with Outlook Issue We also will discuss some alternative solutions to deal with the situation. This article will discuss how you can fix the Office 365 calendar not syncing with Outlook 2016 issue.

But, many users often face issues with Office 365 calendar syncing to Outlook for various reasons. The related settings of any SharePoint version can easily blend with calendar integration. Moreover, Office 365 calendar sync can help to combine it with SharePoint view. You can also easily configure and sync your Office 365 calendar with Outlook in a few seconds to double the productivity. These features ensure a smooth collaboration within teams without any confusion of schedules and meetings. If you need other users to edit or view the calendar, there are multiple options available to help.

It will enable you to share your plan with colleagues so that they can add it to their view in Outlook. Office 365 Calendar is one of the most utilized features which have made the user’s life so much simpler by allowing them to track their own as well as other’s schedules, manage tasks, and share progress with other contacts.

Office 365 outlook 2016 sync issues