I have a Poweredge R520. I go into system setup and set a password, it asks me to confirm. When I finish and it tries to save the settings I get an error message that reads something like "An error has occured. Could not save some settings" And the password does not get saved.
Also, I have gone into UEFI boot menu and unchecked all options except for the OS HD. However, when I hit F11 and go into the boot menu, it still shows all options.