About
I’m Bram Brinkmeier, a cloud and identity security engineer based in Germany, originally from Belgium. By day I run Microsoft 365 security: Entra ID, Conditional Access, Exchange Online, Intune, Defender XDR and detection engineering in Microsoft Sentinel.
In my spare time I work on the offensive side: bug bounty hunting on Intigriti, CTFs, and research into Microsoft cloud identity. That’s where this reference comes from. I wanted one place that reads sign-in errors the way both an attacker and a defender would.
What I build
Section titled “What I build”- TenantLens: an open-source, read-only security posture scanner for Microsoft 365, Entra ID, Exchange Online and Azure.
- Security writeups: CTF and lab research.
Contact
Section titled “Contact”This is an independent site. It isn’t affiliated with Microsoft or with my employer, and nothing here is based on employer data.