You need to be an Owner of a distribution group to be able to add or remove members.

To become an owner of an email distribution list, please submit a ticket.

(Please CC or mention your supervisor or the department head in the ticket)

As an owner of a distribution group, you are able to add or remove members in your distribution group. 

To see groups for which you are an owner follow the steps up until Method A - step 1.3 for app and Method B - step 3.1 for web (Double click on the group that you wish to modify and check if you own the group).

Choose a method: