Permissions
To add Managed Users to groups, you must be:
- An Admin
 - A Co-Admin with the Manage groups permission enabled
 - A Group Admin
 
Only an Admin or Co-Admin can add App Users to groups.
Only an Admin can add Service Accounts to groups.
Adding users to groups
- Go to Admin Console > Users & Groups.
 - Click the Groups tab.
 - Click the name of a group.
 - In the Members section, click Edit.
 - Click Add Members.
 - Enter the names of one or more managed users in your organization.
 - (Optional) Select Set as Group Admin if you want all of the added users to also be group admins.
 - Click Add.
 - Click Save.