Uso delle versioni precedenti di Outlook per Mac per la posta elettronica e il calendario a uso personale
Hello
When you received a request, it doesn't mean they have your password or accessed your account. They can have your email address probably via data breach from other businesses, then they go to Microsoft website, use the "forget password" option. That would trigger an authentication ask. You can continue to reject that, so they wouldn't be able to proceed to change your password. It means security is effective.
But I understand this can get annoying. You can also do this to stop this from happening altogether.
Go to your Microsoft account online https://account.live.com> Sign in > Your info > Sign in preference. Add an alias - You have two options here: Create new: this will allow you to use the native domain outlook.com to create a new alias. Add existing: this will allow you to add a 3rd party email address, such as yahoo, gmail, as long as they are not already associated with another Microsoft account. Once added, make this new alias your primary alias, do NOT delete the old alias. Then at the bottom, click on "Change sign in preference". On the next page, uncheck the box for the old alias. This means, from now one, the old alias cannot be used to sign into your Microsoft account, but it can be still used to receive emails, etc.