If you've implemented multi-factor authentication, you should disable the default basic authentication to make sure attackers can't exploit it. Attackers will go after weaker credentials and passwords ...
Microsoft this week again appealed to organizations using Exchange Online to move away from using "Basic Authentication," reminding them that support for it will get dropped, starting on Oct. 1, 2022.
Multifactor authentication can improve account and IT system security, protecting data against hackers. Learn how MFA works and how to get started.