How to add License key to HP iLO 

go to this url  www.hp.com/go/ilo then click on License tab

choose license you want

for this tutorial i have chosen 60 days trial license

you will receive an e-Software confirmation mail

follow the link which is given in you email 
you will get your License 
after that enter your iLO 
Click administration
Licensing 

Enter you Licence Key 
Click Install 
Done Enjoy HP iLO !