You guys are right I just fresh installed Windows Server 2012 R2 Foundation ROK HP TR,EN,PT,ND,SV 20160129D on my HP Proliant ML350p Server & the results are: So Server won't activate without Slic table.
That -YWP26 is a generic installation key, it will let you install, but not activate. The same thing is likely with a new version ROK ISO. have you tried Windows Loader (if MBR install) or EzWindSlic (if UEFI)? Then kms_vl_all is also an option.
What thru me off was installing Server 2008R2 ROK ISO. It OEM activated instantly. I just opened the ISO it has an OEM folder in root. No wonder. I still would like to have the Server 2022 Standard ROK for the specific software embedded. But looks like no luck.
The presence of the oem folder does not mean it will automatically activate, even if it automatically installs. Always check activation status afterwards using slmgr.
When you do go back to your offline Storage Server could you allow us the opportunity to use HPE Server 2022 ROK?