Talk about Steam... the reason i went with Steam also for MSFS is mostly because it took me a few days and lots of aggrevation and irritation to even get a Microsoft account. "You can't use an email address from your work or school, use a personal email address". That was MS' welcome to try to get an account. Yeah, right, i am retired and i USE a personal email address for god sake ! WTF !?? ( i am from the Netherlands..). Second reason, all my sims and other games i bought via Steam. Never a problem always smooth as butter, fast as furious. Particularly the best thing since sliced bread when it comes to reinstall.
Like it's always been before when there's an update, i start MSFS, get a screen that says "checking for updates", get a screen that tells about the update with a button that says 'Install' and, in this case, after about 30 minutes all 22Gig of new stuff is on board without me having to do anything and a new button pops up that says "Continue". Once in the main menu i do have to go into the Content Manager and click the install button for the new regional stuff.
And you know what, i have never ever moved my 'Community Folder' out of my 'MSFSPackages' folder. Never a problem.
Btw, just curious, i did not install this new 'France/Benelux' scenery at first. Thought i'd inspect Amsterdam first after the 1.15.7.0 World Update. Indeed nothing changed sofar. It's nice but the houses/buildings don't look like what the're supposed to look like at all. After installing the France/Benelux scenery and again flying over Amsterdam i was glad i had fastend my seatbelt otherwise i would've fallen smack dab on the cockpit floor. This is my own Amsterdam! Finally! Wow!!
Tis true, you'd better not get below 500 feet because it'll make you feel you had been taken too much advantage of the coffee shops down below...
All i can say is that i LOVE MS for giving me so much flightsimming fun for more than 30 years but when i read about all these problems with installation and updates of MSFS ever since the memorable occasion of its release i am glad i bumped into this silly and annoying problem of just getting a stupid email address accepted. It really felt like a true potential for disaster so i said goodbye to MS and Hello to Steam.
I know it won't help much, just saying... Good advice for future MSFS buyers i think it is... (no affiliation with Steam whatsoever, just think it's installation heaven)