Azure authentication & process mailboxes

Sysadmin Security question - My understanding is if we use Azure authentication as SSO and auto-provisioning, everyone that logs in to our enterprise account has to be real person with their own email address. We cannot assign a license to a 'process mailbox' that multiple people access. We're in a Microsoft environment obviously (Azure, Exchange).

This question is coming from Control Center blueprint owners. The Smartsheet help on CC says to use a process mailbox so multiple people can administer the Control Center. I don't believe that is an option for us given our mandatory authentication to Azure Directory.

I'd appreciate confirmation from those that understand the security settings.