After TWO straight goddm weeks of searching, scouring and calling Dell 22 times, I managed to not only find, but also order, register, get lic xml file AND import lic key into the sleds. Had to import lic keys via cli; did not see or find any other way. After importing lic, rebooted the compute sled and RAID mode was available. After that, it was straightforward RAID configuration. This  lic is not publically available; my company is a Dell premier partner and I found details buried in a 2017 doc on FX2s architecture. Anyway, I have figured out what it takes to get these darn licenses. List price is $900 for DUAL-PERC but with our premier partner discount, cost us $400 for ea. FD332 sled. This is for DUAL-PERC cards running in HBA mode. These lic ARE tied into service tag of the SLED (not FX2s or perc card serial itself).  Hopefully this helps.
I recently acquired a FD332 storage array for my FX2s chassis along with my 2 FC630 compute blades. When trying to create virtual drive, it advised me that I need to switch the FD332's mode from HBA to RAID in Controller Management > Advanced Controller Management. But when I got there, the option to change is not there.  So I checked my licensing:[IMAGE] The CMC advises me to go to the Dell Digital Locker, but when I get there it asks for a Registration number.  I do not have this because I acquired the array second-hand.Is there a way to purchase licensing?  If so, how?  Hoping someone here has had this issue before.    
FD332 Raid License - Unable to switch from HBA to RAID for vSAN