default primary smtp suffix azure distribution group

We want our helpdesk to start creating 365/Azure cloud distribution groups in Active Roles. We are wondering if there is a way to change the default primary smtp address suffix that is initially shown on the create new dg form.

For example, helpdesk creates a new 365/Azure DG in AR and the default domain smtp suffix shown is (one of our subdomains in 365 tenant). The helpdesk has to click the drop down and select domain.

Is there a way to make it default to As much we tell the helpdesk to select someone will always forget and we have to go back and clean it up.