Hi,   There isn't a way to reflash the main board from R720 to R720XD, unfortunately. The firmware and BIOS shares the same file for R720 and R720XD.   Let me know if you have any questions.
Hello. I had to do a motherboard swap on a R720XD due to a failed iDRAC7 controller. We purchased a used motherboard that was evidentially for a R720, not a R720XD. Everything is up and running except everything is showing it is a R720 and I can only do firmware updates using the R720 Platform Specific ISO. I've also reset the service tag to what the previous motherboard was set at. I can live with it how it is since everything seems to be working, but and may cause confusion later on down the road. Is there a way to get it back to being a R720XD?
R720XD Showing as R720 After Motherboard Swap