This just worked well, reportedly also works on Dell:
Get-WmiObject Win32_BIOS | Select-Object SerialNumber
Category: HP/HPE
Get HP serial number for a Windows PC
article #1565, updated 144 days ago
HPE iLO Configuration Utility
article #1532, updated 336 days ago
Here’s a search which got me to it, once logged into HPE.com.
You’ll also need a driver, which does not come with the SPP.
HPE USB Key Utility for Windows (for the SPP etc.)
article #1470, updated 788 days ago
To make a bootable USB stick for the HPE SPP (Service Pack for Proliant), which includes all firmware and drivers, one must use:
the HPE USB Key Utility for Windows
and it has to be a 16G or 32G USB stick. Larger won’t boot. Rufus and Ventoy also fail as of 2022-02-18.
To Get HPE Product Number: The HPE PartSurfer!
article #1434, updated 961 days ago
HPE must be growing a sense of humor. This thing really works well:
Download Reload ISOs for HP Business and Consumer Machines
article #1377, updated 1417 days ago
Just got this from HP support. They’re taking a while to answer, but they do have some help to give.
For HP business machines: support.hp.com/in-en/document/c05115630
For HP consumer machines: support.hp.com/in-en/document/c06162205