Hello Jason,
Thank you for reaching out to Microsoft customer support. I'll be happy to assist you with your questions.
- Yes, Virtual Windows Server DataCenter 2022 has unlimited virtualization rights.
- Yes, Virtual Windows Server Standard 2022 with Software Assurance has two OSE VM rights.
- Yes, Windows Server Essentials 2022 with Software Assurance can be installed virtually.
- Yes, you can install all these on a server with only one CPU in a 2-socket server.
- No. According to this document, Data Protection Manager can backup VMs and applications.
What can System Center Data Protection Manager back up? | Microsoft Learn
For questions about DPM, please go to Q&A forum https://learn.microsoft.com/en-us/answers/questions 6) No, you must run a Windows container with a supported container runtime available on your machine. The runtimes currently supported on Windows are containerd, Moby, and the Mirantis Container Runtime.
https://learn.microsoft.com/en-us/virtualization/windowscontainers/quick-start/set-up-environment
- Yes, container can failover within OSEs. You can add multiple nodes to a Docker Swarm.
Get started with swarm mode | Microsoft Learn
- I think it's possible to create an MPSA account with Microsoft directly however you would need to confirm with Microsoft.