1. In a web browser, navigate to portal.office.com, select Outlook.

    A screenshot of portal.office.com showing the link to outlook in O365

  2. Under the Groups section, select the name of the group.

    A screenshot of the Groups menu on Outlook for Office 365

  3. In the top right corner of the window, click on the members section.

    A screenshot of the link to the members section link on the groups management page in Office 365

  4. Right-click on the name of the person you would like to remove from the group.

    A screenshot of the context menu for removing a person in groups management page in Office 365

  5. Click Remove from group.