Include mail-enabled groups in Audiences?

Hi.

We use mail-enabled groups for various things related to our premium tenant workspaces. I'm looking at Audiences today, and it doesn't look like I can add a mail-enabled group to an audience? I mean, I *can* add it and update the app, but then the group disappears from the audience. Thoughts?

I should add that we're using the particular group in question as an admin on the workspace, so I can see the audience content, but I can't see the one report that is permissioned only to my new audience.