Using VmmID as a Unique Identifier for an SCVMM Server

Hello,

We are looking for an officially supported and stable way to uniquely identify a Microsoft System Center Virtual Machine Manager (SCVMM) server.

We found that some Microsoft documentation references the following registry value:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft System Center Virtual Machine Manager Server\Setup
VmmID

Specifically, it is mentioned in the Azure Site Recovery documentation for SCVMM 2012 R2.
In addition, Azure Arc exposes a properties.uuid field for a registered SCVMM server, documented as the "Unique ID of vmmServer."

We would like to clarify whether the Azure Arc properties.uuid value represents the same identifier as the SCVMM VmmID.

We would like to clarify whether VmmID is considered an officially supported unique identifier for an SCVMM server in the following versions:

• System Center Virtual Machine Manager 2016
• System Center Virtual Machine Manager 1801
• System Center Virtual Machine Manager 1807
• System Center Virtual Machine Manager 2019
• System Center Virtual Machine Manager 2022
• System Center Virtual Machine Manager 2025

We have a few questions:

1. Is VmmID intended to be a stable and unique identifier for an SCVMM server throughout its lifetime?
2. Is it officially supported to use VmmID as the server's unique identifier for third-party integrations?
3. Is the registry location and value name guaranteed to remain available and unchanged across supported SCVMM versions?
4. Is there an officially supported API, PowerShell cmdlet, WMI/CIM class, or SDK method to retrieve this identifier instead of reading it directly from the registry?
5. If VmmID is not the recommended identifier, what is the officially supported way to uniquely identify an SCVMM server across versions?

Thank you.