To manage the roles of your group members or to remove members from your group, go to your group's home page and click the View All button under the list of members in the right rail:
On the subsequent screen (shown below), any admin can remove anyone from the group by clicking the Remove button. Admins may also click on the Edit button to manage the roles in the group (either GroupMember or GroupAdmin.)
If you have any issues managing your group, please email the Community team at: CBfirstname.lastname@example.org.
Please note: the above is the Community Team email alias and the Community Team cannot provide product support.