Impact Assessment: How Guest Access Affects Threat Detection in Office 365
Currently working on a deep-dive into a critical Teams guest access behaviour I discovered during testing.
My research shows how attackers can spin up fresh M365 tenants and completely bypass Defender protections by pulling users into external guests.
I’m documenting the attack flow, detection queries, and practical steps organisations can take to reduce exposure — learning a lot along the way.
#CyberSecurity #LearningInPublic #ThreatResearch #RedTeam #BlueTeam #Microsoft365 #Defender #SecurityCommunity
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