Hi underQualifried. I'm sorry you are feeling frustration here. Hopefully I can help a little with that.
Azure Front Door is an Azure service that provides fast, reliable, and secure access to other services hosted in Azure. In the context of this article, this service is Intune. You don't have to explicitly know anything about AFD and this change is transparent to the service and devices managed by it for many/most organizations.
The most significant change is that this does alter the network destination (aka endpoint) for managed devices to communicate with the Intune service. Like all things on the Internet, this destination, is defined by an IP address (or addresses) and is abstracted by DNS and domain names. Thus, you will only be impacted if instead of using the domain names you directly reference IP addresses to allow or block Internet traffic since that's what is ultimately changing here to communicate with the service.
This change is completely transparent to you and your managed devices if either of the following is true:
- You don't block traffic to or from the Internet at all.
- You block or allow traffic to or from the Internet using domains names (aka FQDNs).