Almost every Microsoft 365 audit we run turns up money nobody knew they were spending.
Licensing sprawl happens quietly — a tier upgrade here, an add-on trial that never got canceled there — until the monthly bill no longer reflects what the organization actually uses.
The Five Line Items Worth Checking Today
1. Unassigned and unused licenses. Departed employees, seasonal staff, and duplicate accounts often keep a full license active for months. 2. Mismatched tiers. Front-line or part-time staff on E3 or E5 licenses when a lower tier covers everything they actually use. 3. Add-ons nobody adopted. Power BI Pro, Teams Phone, or premium security add-ons purchased for a project that never launched. 4. Overlapping security tools. Paying for a third-party email security or backup tool that duplicates what's already included in your current Microsoft tier. 5. Legacy per-user pricing. Contracts signed years ago at rates well above current published pricing, still auto-renewing.
Why This Keeps Happening
- IT admins add licenses fast during growth but rarely audit during slowdowns
- Procurement and IT often don't share visibility into the same license report
- Microsoft's tier and add-on structure changes frequently, and legacy plans get grandfathered without review
What a Proper Licensing Review Looks Like
A real review cross-references your license report against actual usage data, active directory, and HR records — not just what's listed on the invoice. That's where the unused and mismatched licenses actually surface.
Final Thoughts
Microsoft 365 waste is one of the easiest cost recoveries in IT because the data already exists — it just needs someone to actually look at it. A free IT and contract review usually catches it within the first pass.