Passing the SC-900: What We Think We Know
I went into the SC-900 confident. Working at an MSP, I use Entra and Defender every day. What I didn’t expect was how much the exam would reveal about the edges of what I actually knew.
[ OK ] Mounted /var/log/conscience — write access enabled
[ WARN ] work-life-balance.service failed to start — unit not found
[ OK ] Loaded existential-dread.conf — 14 clients, 1 soul, infinite tickets
# Diary of a SysAdmin— "the examined network is worth living"
# Diary of a SysAdmin — dispatches on infrastructure, entropy, clients, and the long silence between reboots.
role: "Senior Sysadmin @ undisclosed MSP"
experience: 14 years // most spent burning the midnight oil
clients: ∞ // each a universe of suffering
open_tickets: ∞
philosophy: "all systems tend toward chaos. tend back."
I went into the SC-900 confident. Working at an MSP, I use Entra and Defender every day. What I didn’t expect was how much the exam would reveal about the edges of what I actually knew.
I recently passed the Microsoft Applied Skills credential for Entra identities and access. This one stood out for a simple reason — it felt like real work.
A homelab gives you something you rarely get on the job — a place to learn without fear. It is where theory stops being abstract and becomes instinct.
Being a better sysadmin isn’t mainly about learning more tools — it’s about building habits that make you consistent under pressure.
A day in the life of an MSP tech is way more than reading tickets and closing them out. The ticket is often a symptom — not the diagnosis.
New entries when the queue permits. No tracking. No noise. Just dispatches from the machine room.