So I made someone the Owner of a particular distribution list that I want him to manage. By going into the Properties of it from his own Outlook client, it allows you to Add and Remove members. However, even though he is owner, when he tries is this way, we get an error saying "Changes to the distribution list membership cannot be saved. You do not have sufficient permission to perform this operation on this object."
I made him the Owner! What more would I have to do to give him permission to do this?