Where does the iDrac get its time if you don't set the NTP server?

Howdy,

I know that in the IDrac settings there is a place to turn on Time sync and specify a Time Server.  However, if I don't have that turned on, where does the iDrac get its time?

We have time sync turned on within Windows so does that pass the time to the BIOS and does the Drac get its time from there?  Just not sure if we need to have time sync turned on in Windows and in the Drac or if one takes care of the other.

Thanks.