Hi, I'm John!
To help narrow down the issue:
Do you currently have full access to your Microsoft account (you can sign in normally and see your inbox and settings)? Please check signing in online at https://account.microsoft.com let me know how it goes.
To be safe, I recommend the following steps:
Check your account rules and forwarding settings, hackers create rules that automatically forward or delete emails. You can do this in Outlook settings under Mail > Rules and Forwarding. https://support.microsoft.com/office/manage-email-messages-by-using-rules-in-outlook-c24f5dea-9465-4df4-ad17-a50704d66c59
Just to be safe, I’d recommend to sign out everywhere. Visit: https://account.live.com/proofs/manage/additional Scroll down to Sign me out and select "Sign me out".
- After signing out everywhere, please monitor if the issue persists in the coming hours.
And changing your password again and enabling two-step verification if you haven’t already. This will add an extra layer of security to prevent future unauthorized access. "How to help keep your Microsoft account secure" https://support.microsoft.com/account-billing/how-to-help-keep-your-microsoft-account-secure-628538c2-7006-33bb-5ef4-c917657362b9
Click "Add comment" to let me know.
Regards,
John J.D.