M365 Copilot GA: When Enterprise AI Hits Your Clients
Published: January 15, 2024 (retrospective)
Microsoft 365 Copilot’s September 2023 general availability created immediate cybersecurity headaches for SME fractional CISOs like me. Clients asked: “Is this safe to roll out?” My answer was always the same: not without an audit first. I built a suite of PowerShell tools—orchestrated by early Control Tower prototypes—to find out.
Risk Patterns Found
Across 12 client audits in Q4 2023 and Q1 2024, three risk patterns dominated:
- Over-permissive app consents: 67% of tenants had third-party apps with excessive Graph API permissions
- Mailbox forwarding rules: Weaponised by attackers pre-Copilot, now surfaced by AI queries
- Intune policy drift: Devices out of compliance baseline, Copilot amplifying exposure
| Finding | Prevalence | Avg Fix Time |
|---|---|---|
| App consent overreach | 67% | 2h |
| Forwarding rules | 23% | 45 mins |
| Intune policy drift | 11% | 3h |
The Audit Stack
PowerShell + Graph API + ChatGPT-generated report templates cut audit delivery time from 3 days to 6 hours. Every finding logged to GitHub for client traceability—an early governance habit that fed into SentinelForge later.
Lessons for IT Leaders
- Enable Copilot only after a permissions audit—not before.
- AI tools surface hidden risks as well as create them.
- Automation + human oversight beats manual-only every time.
Need an M365 Copilot readiness audit? Book via richardham.co.uk/services.
Next: Zero-trust frameworks collide with AI governance (Apr 2024).