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Cameron Geehr

Enumerating Emails via Office.com

May 18, 2020 By Cameron Geehr

On a recent penetration test, I discovered that manually attempting to log into Office.com would give an indication as to whether an email address exists or not. Both of the techniques I was familiar with for Office365 username enumeration, using the Autodiscover API and ActiveSync, have both been fixed so this was definitely something worth exploring. I captured a few ... READ MORE

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