Azure AD group-based license management

• We have a limited number of A3 licenses and an Unlimited A1 licenses 
• Want to use Group Base License to assign licenses based on a expression located in Security Group's "Dynamic Membership Expresssion"
• Users are added to my On Premise Active Directory using MIM
• Have an automated powershell script that Enable-RemoteMailbox on the new user
• Using the latest version of Azure AD Connect

Questions:

1. Is there a Advance Rule I can created that will evaulate that new user and determain if I ran out of A3 licenes and assign the new user an A1 license?

2. If question 1 possible, have a rule to re-evaulate the user and assign an A3 when a new A3 license becomes avaiable?

Thank You,

-Larry