As a group owner, you can add and remove additional owners and deputies to and from your group as needed via the Manage Group Wizard in Resource Admin.
Procedure
Log in to Resource Admin.
Select Groups from the Resource Type menu and search for the group you want to update.
Click the gear icon on the group record and select Manage Group Wizard.
Under Select Options, select Edit group owners & deputies
Click Next.
You should see an Edit Group Owner and Deputies form.
Do the following based on your scenario: