How to update Dell firmware from Lifecycle Controller with error “The updates you are trying to apply are not Dell-authorized ..

Recently i have tried to update my R720 PE Dell servers firmware (suspecting that multiple SATA hdd damages are due to wrong not updated RAID controller firmware, btw wrong suspect), but got below error:
At first i thought that it’s temp ftp.dell.com server problem, later that it’s due some problems with DNS for ftp.dell.com in Mongolia. But everything was easier, just in wrong outdated iDRAC version (and integrated into it LC/lifecycle controller) so that LC couldn’t properly get firmware from Dell ftp.
So just go to Dell site:
  • enter your server tag
  • and download the latest iDRAC firmware (not legacy)
  • upload and update iDRAC from :
  • restart server and try again “Firmware Update” from LC.
ps
Btw it’s good practice to update firmware for your server – very few in Mongolia do it (not only BIOS firmware). Especially firmware for your storage, even for SAS hard drives, RAID controllers.