Effective December 3, NetApp adopts Microsoft’s Business-to-Customer (B2C) identity management to simplify and provide secure access to NetApp resources.For accounts that did not pre-register (prior to Dec 3), access to your NetApp data may take up to 1 hour as your legacy NSS ID is synchronized to the new B2C identity.To learn more, read the FAQ and watch the video.Need assistance? Complete this form and select “Registration Issue” as the Feedback Category.
You can view the NDMP Host ID in the "SnapVault" tab of the OSSV Configurator (assuming a Windows based systems) or using the svhostid executable in the install path (C:\Program Files\NetApp\snapvault\bin>svhostid.exe in Windows).
You are correct - the id produced by that command changes each time and I am unable to find any support documentation for it. I missed that it was changing when I ran it multiple times yesterday, however I have verified that it did not change the ID viewable in the OSSV Configurator, which remains the original value on my system.
Indicates a unique identifier that the Open Systems SnapVault agent fills automatically. This identifier is used by NDMP-based management applications to identify the primary storage system. You must not modify this field.
So if these hosts do not yet have working SnapVault relationships I recommend reinstalling OSSV on them to ensure unique host ids.