How to Add Members to An Office 365 Group Note: For a guide on removing members from Groups, click here. 1. Sign in to Office 365 @ https://techmail.forsythtech.edu 2. In the Navigation Pane, under Groups, select the Group you'd like to manage. 3. On the right side of your window, in the Group header, select the member count. 4. Click on the circle next to Add members. 5. Enter the email address of the member you would like to add, and click Save.