Unsuccessful login attempts

The reason for this is your email is exposed to the public. I have the same issue and I checked my account details and saw my email is accessed from different countries. I checked my 1-month activity and there were 84 pages of unsuccessful attempts. Yesterday I contacted Microsoft customer care and one told me the ultimate solution.

Solution

First, open your Outlook email account, and then under your photo, click "My Microsoft account". On the new page, click "Your info". Now look for the "Account info" section and click "Sign-in preferences". On the new page, see the "Account aliases" section and add an email address or phone number that nobody knows. Make sure the email address or phone number that you are adding is working one's. Remember, DO NOT remove your Outlook email address from here because it will permanently delete your Outlook email address forever. After adding the new email address or phone number, click "Make primary" as the new email address or phone number so that your outlook email address is not primary now. Now click "Change sign-in preferences" from the bottom. On the new page, uncheck your Outlook email address box and check the newly added email address box or phone number box that you want to use as your login email address or phone number. Now onwards, when the hacker tries to use your email address to log in, Microsoft says, that email address does not exist. Remember, you can still send and receive emails using your email address. Additionally, you can sign out from everywhere by visiting your account page. Click the "Security" tab, and look for "Manage how I sign in" under the "Account" section. This will sign out from every device that your Outlook email address is connected to. Thanks, Microsoft for this excellent work.