So I finally passed MS-500 last week after two brutal failures and I wanted to share what actually made the difference because I couldn't find anything useful when I was searching for MS-500 Microsoft 365 Security Administration practice test resources that went beyond surface-level advice.
My first two attempts I was studying the wrong way — reading documentation and watching videos but never actually testing myself under pressure. What changed everything was grinding through timed practice exams. I used MS-500 Test 1 religiously the last two weeks before my third attempt, and the question phrasing is surprisingly close to what you'll see on the real thing. Pay close attention to Defender for Identity vs Defender for Endpoint questions — that distinction tripped me up constantly.
The domains that hurt me most were Information Protection and Governance (I kept confusing sensitivity label scopes) and Threat Protection. If you're building your MS-500 study guide, weight those two heavily. I scored 712 on my first fail, 739 on my second, then 831 on my pass. The difference was almost entirely practice test volume and reviewing every wrong answer carefully.