Managing personal Outlook.com account settings, security, and privacy
@Jason said
Firefox as my main browsing then I switch my main browsing to Microsoft edge, but I think it made a new account
Changing browsers will not create a new Microsoft Account alias.
now I can't sign in into my old account its not in my alias and also microsoft cant send me codes anymore
Your account might have been hacked. (The browser switch was just something that happened at the same time).
Start with the Account Sign-In Helper and follow any suggestions it offers.
- In a Private/Incognito browser session, open: https://aka.ms/sign-in-helper
- Scroll down to "Choose how you normally sign in, then enter your details"
- Click "With an email address"
- Enter your email address and click [OK]