It's great that we have the ability to modify the consistent meeting ID's but would also really like to customize our user ID's as well without having to contact support. We used SAML to import our user table and was assigned all kinds of different styles.
If you're a Group Admin you can modify IDs for users that show up in your Manage Users section of Group Admin, or at least should be able to. No need to contact support. Simply choose the user you want, select the edit icon for them, modify the Blue Jeans Meeting ID, and click Save.