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Major security breach with my Office 365 mailbox
There has been a major security breach with my Office 365 mailbox this morning and I don't believe it was due to the usual method of simply logging in with a phished password. What I saw this mor...
Doubtful. It's most likely a direct account breach. Setup MFA to prevent this first off. Second, go into your audit logs and search, you will most likely see the person that logged into your account and from what IP. That will verify the issue.