Recently myself and members of my team have assisted several customers in migrating from vMX100 to VMX-x (S/M/L) in Azure. Customers are typically looking for a migration method that minimise their risk & downtime. I have compiled a document outlining a method that has worked well for us. In short, the method involves installing a vMX-x in parallel to the VMX100 & re-routing traffic prior to de-commissioning the vMX100.