HPE stopped giving driver/firmware without having valid active Contract ID with HPE. There is cost involved to produce driver/firmware as well. So in order to get them people who are using HPE products need to have active support contract with HPE.
Still if you get any external link to get the driver/firmware then there is no guarantee that it will be authentic and safe to use because most of the time this type of download fetches trojan virus or similar virus as well.
Hope this helps!
Regards
Subhajit
I am an HPE employee
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