- Go to https://account.live.com/proofs/manage/additional
Login if you have to + It may require email verification to access for security reasons - Click “Add a new way to sign in”
- Select “Email a code”
- Enter the new email
- You will now receive a code to the new email copy it into the field
- Added, now you can optionally remove the other email if you wish to only keep the new email added
- Done, security email updated!