Outlook is one of the best email clients used by many around the world. It is also the topmost email client trusted by millions of users for their business and personal purposes. Many users are undergoing issues while using the Calendar. The Calendar issue is mostly faced when people use Shared Calendars in Outlook 2016. This causes data loss, and you won’t be able to access the Office 365 Calendar. The problem mostly occurs when Outlooks 2016 runs in cached modes with Office 365 or Exchange. If you are undergoing such issues, consider the steps that are given below to fix the issue of Outlook 2016 Shared Calendar Permissions Not Working from a Windows computer.