Use a unique, strong password that you do not use anywhere else.
Researchers recently discovered an unsecured database containing 149 million login credentials in plain text, which included over a million links to Outlook accounts. Protection Measures 440k Outlook.com Domain HQ base.txt
If you suspect your information may be in such a list, security experts from Microsoft Support and companies like ImmuniWeb recommend: Use a unique, strong password that you do
Approximately 440,000 records of email and password combinations. Use a unique
Microsoft reports that MFA can defeat 99% of password attacks .