Configuring preferences and options in Outlook.com
No idea!
I don't think we've compared notes on the accounts we're using. I've two accounts attached to the app - a M$ exchange account for my business, and a SMTP account for personal stuff. If the SMTP account isn't loaded, all is fine. The M$ account alone seems fine. The SMTP account is a btinternet.com email account. Pretty common in the UK. Only been a problem since about the middle of December for me. Been running happily for two years before this.
Regards
M