For almost every HP server running iLO 4, the default factory settings are: Administrator Password: A unique 8-digit alphanumeric string
If you cannot find the physical tag, you have several options to regain access: iLO default username always Administrator? - Server Fault ilo4 default username
Look for a plastic "SLA" (Service Information) tab on the front or back of the server. It usually slides out like a small drawer. For almost every HP server running iLO 4,
If "Administrator" and the password on the tag fail, the credentials were likely changed by a previous admin. Here is how to regain access: ilo4 default username