Microsoft 365 license sprawl: what IAM teams need to fix

TL;DR: Microsoft 365 cost waste usually comes from unused, oversized, and auto-renewed licenses, with CoreView data showing an average of 44% of licenses are underutilized or oversized, according to Zluri. The governance lesson is that license spend is an access problem as much as a procurement problem, because entitlement hygiene and renewal discipline drive cost control.

NHIMG editorial — based on content published by Zluri: SaaS Management 3 Ways to Optimize Microsoft 365 License Costs

By the numbers:

• An average business uses 44% of Microsoft 365 licenses that need to be more utilized or oversized.
• You can save up to $360/Y by identifying unused Microsoft 365 licenses in the example shown.

Questions worth separating out

Q: How should organisations reduce Microsoft 365 license waste without disrupting users?

A: Start with utilisation data, then downgrade only the users whose work does not require premium features.

Q: When does Microsoft 365 license sprawl become a governance issue?

A: It becomes a governance issue when over-assigned or unused licenses persist because no one is checking entitlement need against real activity.

Q: What do security and IAM teams get wrong about license optimisation?

A: They often treat it as a procurement exercise and miss the access-control dimension.

Practitioner guidance

• Map licenses to real usage tiers Compare Microsoft 365 subscription level against actual feature consumption, then downgrade users whose activity stays within lower-tier needs.
• Review renewals before auto-extension Require utilisation review before any renewal window closes, and block automatic re-signing when a license has been idle or oversized for multiple cycles.
• Fold license cleanup into offboarding Make license removal part of leaver and mover workflows so dormant subscriptions are revoked when roles change or employees exit.

What's in the full article

Zluri's full article covers the operational detail this post intentionally leaves for the source:

• Step-by-step methods for evaluating Microsoft 365 license usage across users and applications
• Examples of how to identify unused or oversized licenses before the next renewal cycle
• Operational guidance on setting renewal alerts and coordinating procurement decisions
• Vendor-specific licensing and negotiation detail that sits beyond this post's governance focus

👉 Read Zluri's article on cutting Microsoft 365 license waste →

Microsoft 365 license sprawl: what IAM teams need to fix?

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