1. In a web browser, navigate to portal.office.com, sign in, select Outlook.
  2. Under the Groups section, select the name of the group.
  3. In the top right corner of the window, click on the Gear Icon to open the Settings section.
  4. Select Edit Group.

Allow non-members to send to your Group

  • Check off the Let people outside the organization email the group box

Disable non-members from sending to your Group

  • Uncheck the Let people outside the organization email the group box