Send your groups to Mediaflow

On the same page, under Group membership (optional):

Under Google groups, search for and add each group that Mediaflow's SSO setup page lists for you.
Under App attribute, enter exactly: http://schemas.microsoft.com/ws/2008/06/identity/claims/groups

The Group membership section with a group added under Google groups and Mediaflow's groups attribute name under App attribute.

Google sends only the groups you add here, up to 75. A user's membership counts whether they are in the group directly or through a group inside it.