Configuring preferences and options in Outlook.com
TO everyone in this forum who has had the problem with setting default email address in Outlook.com (which I confirmed flows through to the Outlook 365 email client):
After weeks of failing with the Settings>Email>Sync Email route in Outlook.com email (and getting the ""Unable to Load these Settings" error), Donny's suggestion of going to https://account.live.com/names/manage](https://account.live.com/names/manage) and changing my "Primary Email Address" WORKED!!! :) No more frustration ... thank you Donny & [Diane Poremsky MVP.
NOTE: After I made the update in my Microsoft Account settings, it took about 15+ minutes for the default update to be reflected in Outlook.com and Outlook 365. To play it safe I would suggest waiting 30 minutes and then logging out and back into your account(s).
MICROSOFT > please update your Help pages so people get accurate information.
This did not work for me, actually. I switched my primary email to the outlook.com address several days ago and it still defaults to my custom domain.
I know this seems to be the opposite of what most folks would want to do, but we were thinking of getting rid of our custom domain.