Three different sets of rules apply to customers who bring their own licenses to run Microsoft software at a dedicated hosting firm.

A Service provider who hosts Microsoft products on hardware that is fully dedicated to the customer’s use.

Outlines customer options to apply on-premises licenses with Software Assurance (SA) to cover use of Microsoft software within workloads hosted at multitenant service providers.

New licensing rules favor Azure over competing cloud platforms by restricting a customer’s ability to apply Microsoft software licenses to workloads hosted at Amazon, Google, and Alibaba on equipment reserved solely for that customer’s use.

Organization that offers its customers access to services built (at least in part) on Microsoft software; often requires special licensing via a SPLA (Services Provider License Agreement]].