Hello. I'm simply replying to let the community and Microsoft know that 3 months later, hundreds of people are still having this issue with no resolution. Absolutely ridiculous, and its ONLY Flight Sim that gives us this issue. I can install every other program just fine, but not MSFS.
Solved only by re-installing my entire OS. Tried every step on the internet and these forums, a whole other Microsoft Account on a new User Account, completely different license and it still wouldn't download. Someone royally messed up on this one.