My organization purchased a multiple-activation key (MAK) for Windows 8 Pro. Well, as I found out, the free update to Windows 8.1 Pro doesn't make itself available in the Store if Windows is activated through a MAK or another volume license key. I'd like to get our Windows 8 Pro users up to 8.1 Pro to enjoy the new OS but it seems this isn't possible.
I've tried the Windows 8.1 Pro VL iso from MSDN, hoping that an in-place upgrade (or a clean install) would make it happen, but it won't take my organization's MAK key from 8 Pro (It spends a few seconds checking it, then reports back "That key doesn't work - try another one".
What's going on here? Does my organization have to re-purchase a MAK key for 8.1? That seems awfully ridiculous considering the update is free for retail and OEM users.