50k Mailaccess.txt -

An Admin's Guide to Navigating Audit Logs in Office 365 - CoreView

: Turn on Multi-Factor Authentication (MFA) or Two-Factor Authentication (2FA) wherever possible. This is the single most effective way to prevent unauthorized access even if your password is leaked. 50K MAILACCESS.txt

If you suspect your information might be in such a list, take these actions: An Admin's Guide to Navigating Audit Logs in