SPLA audits hit hosters and outsourcers harder than a standard volume audit. Control the scope, reconcile the subscriber counts, and defend the multi tenant boundary before you agree to any number.
A Microsoft SPLA audit lands on hosters and outsourcers harder than a standard volume audit, because the rules turn on subscriber access licenses and the multi tenant boundary. This playbook covers the first response, the SAL reconciliation, the boundary defense, and the settlement math.
SPLA is a monthly usage program, not a perpetual one. That single fact reshapes how the audit must be defended.
The first response decides whether the audit is bounded or open ended. Microsoft describes the program structure on its SPLA program page, and the audit clause sits inside your reseller agreement.
Acknowledge the notice, confirm the named entity, and ask for the audit scope in writing. Do not volunteer data for affiliates or products outside the stated scope.
Route every request through one named owner. Scattered replies from engineers create inconsistent data that auditors read as exposure.
The subscriber access license is the heart of SPLA. Microsoft defines provider use rights in the Microsoft licensing terms, and the reconciliation lives there.
Some products license per subscriber, others per core. Mixing the two is a frequent audit error that inflates the finding. Confirm the correct metric per product before agreeing to any number.
Common SPLA metrics and where disputes arise
| Product family | Typical metric | Common dispute |
|---|---|---|
| Windows Server | Per core | Core counts on shared hosts |
| SQL Server | Per core | Virtual versus physical core basis |
| Office and RDS | Per SAL | Internal staff counted as subscribers |
| Remote Desktop | Per SAL | Dormant accounts left in the count |
SALs are for external subscribers who access the service. Internal administrators and dormant accounts often get swept into the count and must be removed during reconciliation.
The multi tenant boundary defines who is a subscriber and who is not. Auditors tend to draw it wide. The defense is to draw it precisely.
A subscriber is an external user accessing your hosted service. Your own staff administering the platform are not subscribers. The Microsoft Product Terms govern this distinction.
Where a customer brings eligible licenses under License Mobility, those users may sit outside SPLA. Microsoft documents the rules in its License Mobility guidance. Map them before you concede a count.
The common advice is to cooperate fully and fast, hand over every report the auditor asks for, and trust the reconciliation to come out fair. We disagree. In the defenses we ran, broad early disclosure handed auditors raw data they read in the least favorable way, and walking back an inflated count later was far harder than scoping it correctly at the start. The buyer side move is to cooperate within a defined scope, validate every metric and boundary before sharing a number, and present reconciled counts rather than raw logs. Cooperation and discipline are not opposites.
Source: Redress Compliance advisory engagement file, 2024 to 2025.
SPLA is a monthly meter, not a perpetual license. Defend it on the month the access happened, not on the auditor first draft of the year.
The first settlement number is rarely the final one. Back maintenance assumptions and unfiled use estimates are the most common overreach, and both are negotiable.
Auditors often apply support or maintenance charges to the full alleged unlicensed period. Confirm the period, the rate, and whether maintenance even applies before accepting it.
Use the settlement to reset reporting hygiene. A clean monthly SAL process going forward is worth more than the one time number, because it prevents the next audit.
A SPLA audit reviews a service provider compliance with the Services Provider License Agreement. The metric is the subscriber access license or per core licensing for hosted software, not the perpetual licenses you own.
SPLA is a monthly usage program for hosters and outsourcers, so the audit turns on subscriber access licenses and the multi tenant boundary rather than on owned seats. That changes the entire defense approach.
Acknowledge receipt without conceding any count, request the audit scope in writing, and route all communication through a single named owner. The first 10 days decide whether the audit stays bounded.
A subscriber access license, or SAL, covers an external user who accesses your hosted service. Your own administrators and dormant accounts are not subscribers and should be removed from the count.
Draw the boundary precisely. Only external users accessing the hosted service are subscribers. Customers who bring eligible licenses under License Mobility may sit outside SPLA entirely, so map them before conceding a count.
Yes. The first settlement number is rarely final. Back maintenance assumptions and unfiled use estimates are the most common overreach, and both can be challenged on period, rate, and applicability.
The most common overreach is counting internal staff and dormant accounts as subscribers, followed by applying back maintenance to the full alleged unlicensed period. Both inflate the finding and both are disputable.
Keep a clean monthly SAL report. Providers with disciplined monthly reporting close audits two to three times faster and give auditors far less room to estimate usage upward.
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