There are two ways to access data stored in an Office 365 Group data: via Outlook 2016 or by logging into o365.dartmouth.edu. It is important to note that you must have Outlook 2016 downloaded and installed from o365.dartmouth.edu in order to see Groups in Outlook. See https://services.dartmouth.edu/TDClient/KB/ArticleDet?ID=64846 for more information.