How Microsoft Audits Differ by Agreement Type

There is no single Microsoft audit. There is the audit your agreement permits, governed by the clauses you accepted when you signed. Two organizations with the same software estate can face very different processes because they hold different agreements. Before you plan a defense, read the rulebook you are actually playing under.

The Enterprise Agreement is the classic large customer vehicle, built around a committed term and an annual true up. The true up is the moment each year when you reconcile growth in deployment and pay for the increase. It is also where a cloud heavy estate quietly overpays, because Azure and Microsoft 365 telemetry can push the position up faster than procurement expects.

The defense is preparation before renewal. Establish your own pre renewal license position so the true up is a number you have checked, not a number handed to you. The same MBSA audit clause sits behind it, including the 5 percent threshold that triggers reimbursement of verification costs and license purchase at 125 percent of price.

The Microsoft Customer Agreement and the Cloud Solution Provider channel reflect a more consumption based, cloud first relationship. Licensing is often subscription and usage driven, and a partner frequently sits in the middle. That changes where data lives and who holds the contract, but it does not remove the verification right. Microsoft can still reconcile your use against your entitlement, and cloud telemetry makes much of that use directly visible. The defense leans on understanding what is provisioned versus what is paid for, and on keeping the partner relationship from becoming a blind spot.

SPLA is a different animal because it is not an end customer agreement at all. It is Microsoft's monthly licensing program for hosters, managed service providers, and outsourcers that deliver Microsoft software to external customers. It is pay as you consume, reported monthly, and verified across a 36 month lookback rather than at a single point in time.

A SPLA audit is typically run by a Big Four firm under the MBSA audit clause, with broad authority to request deployment records, server configuration data, customer contracts, and usage logs. Hosters apply the SPUR and report SAL or processor counts each month. Back fees at the price file rate are not negotiable, but the penalty uplift, which ranges from 25 to 125 percent, is. The structural defense is reporting discipline sustained across every month.

Figures are indicative and depend on your agreement and the facts.

Three things hold regardless of agreement. Microsoft counts using its own methodology and its own data from Azure, Microsoft 365, and management tooling, so a clean internal report never settles the matter on its own. In 2026, anomaly detection across that telemetry is a common trigger for any of these processes. And the first position the auditor produces, whether an Effective License Position or a SPLA finding, is rarely the final number. It is negotiated after the report.

The practical takeaway is to stop thinking about a generic Microsoft audit and start thinking about your agreement. Identify the clause that governs you, the rhythm of verification it sets, and the single lever that moves your outcome. Then build the defense around that lever.