You can share your emails with others from the Microsoft Outlook 365 email client in two ways: Folder Sharing and Delegate Access. Folder Sharing enables others to access your emails and folders, but it does not permit them to make changes or move the files and folders. On the other hand, Delegate Access allows others to modify the files, folders, and calendars. The delegate access feature allows many people to access one account on Outlook 365, and sometimes it does not work properly for every user. Read more on the solutions for the Outlook 365 delegate access not working problem.