Microsoft SPLA audits target hosting providers and ISVs with some of the most complex and punitive compliance requirements in enterprise software. Claims regularly reach tens of millions. Redress Compliance manages the entire process — controlling data disclosure, challenging inflated findings, and reducing audit exposure by an average of 85%.
The audit notification letter arrives — Microsoft's appointed firm, Deloitte or Ernst and Young, is initiating a review of your SPLA deployments. Your team has 30 days to respond. The audit covers every customer environment in which you deploy Microsoft software, every monthly report you have submitted for the past three to five years, and every product deployment that may not match those reports. The initial claim, when it arrives, is rarely below seven figures. This page explains what a Microsoft SPLA audit involves, why the initial findings are almost always inflated, and how Redress Compliance manages the defence from day one through to final settlement.
The Services Provider Licence Agreement (SPLA) is the commercial framework that allows hosting providers, managed service providers, and ISVs to licence Microsoft software on a monthly per-user or per-processor basis and deploy it in customer environments. Microsoft audits SPLA holders periodically — and with increasing frequency since 2020 — to verify that monthly reporting accurately reflects actual deployments.
SPLA audits are qualitatively different from standard Microsoft licence audits. The scope is broader: every customer environment, every product family, every monthly report across the audit period. The commercial stakes are higher: a provider with 200 customers and five years of under-reporting exposure can face claims that threaten the viability of the business. And the technical complexity is greater: SPLA Product Use Rights, Subscriber Access Licence rules, customer-owned licence scenarios, and the interaction between different server and CAL metrics make measurement errors common — and Microsoft's audit firms do not self-correct them on your behalf.
The most common error providers make is treating a SPLA audit like an administrative exercise. They share data on request, accept audit firm questions at face value, and respond to findings without a structured commercial strategy. The result is an inflated settlement that could have been substantially reduced with expert representation from the point of the audit notification.
Our Microsoft Knowledge Hub covers SPLA compliance frameworks, monthly reporting best practices, and the commercial mechanics of SPLA audit settlements in detail.
We engage within 24 hours of the audit notification and immediately take control of the audit firm's access to your business. We establish a single point of contact for all audit firm communications, review every data request before your team responds, and set the parameters of the audit scope in writing with Microsoft's appointed firm. In one recent engagement for a European managed service provider, day-one scope control eliminated 40% of the audit firm's initial data requests as outside the agreed audit boundaries — before any technical analysis had begun.
Before responding to audit firm findings, we independently verify your actual SPLA deployments against historical monthly reporting. We identify legitimate reporting gaps — which we prepare you to address — and distinguish these from audit firm overreach: measurement errors, incorrect metric application, customer-owned licence scenarios that reduce your SPLA obligation, and Product Use Rights entitlements that offset apparent under-reporting. Our Microsoft licence optimisation team provides technical analysis across all Microsoft server and application product families to support this process.
The audit firm's findings report is a negotiating document, not a final liability determination. We prepare your formal response to each finding — challenging measurement methodology, applying correct Product Use Rights, presenting customer-owned licence evidence, and structuring the technical counter-argument in the format Microsoft's licensing team expects. We brief your finance and legal teams on the range of settlement outcomes, define the walk-away position, and prepare the commercial strategy for the negotiation with Microsoft that follows the findings report. All of this happens before Microsoft receives the findings — so your team enters the commercial conversation with a fully developed response position.
We negotiate directly with Microsoft's licensing and commercial teams on the audit settlement — challenging inflated findings, structuring payment terms, and protecting your SPLA agreement throughout the process. Once the settlement is agreed, we implement the SPLA compliance framework that prevents the conditions that led to the audit from recurring: monthly reporting governance, product deployment tracking, customer environment documentation, and a quarterly internal review process. See our full Microsoft SPLA compliance service for the ongoing management programme.
A Microsoft SPLA audit is a compliance review of a hosting provider or ISV's Services Provider Licence Agreement, conducted by Microsoft-appointed firms — typically Deloitte or Ernst and Young. SPLA audits are uniquely aggressive because they cover every customer environment in which Microsoft software is deployed, often going back three to five years. Claims regularly reach tens of millions. Without experienced external defence, providers frequently accept inflated findings that overstate their true liability.
Redress offers SPLA audit defence on both a fixed-fee and a contingency basis. Under the contingency model, our fee is a percentage of the verified reduction from Microsoft's initial claim to the final settled amount — meaning we are paid only when we deliver a material reduction. We discuss the most appropriate model in the initial 24-hour response call. See our engagement models page for full detail.
SPLA audits typically run for six to eighteen months from notification to final settlement, depending on deployment complexity and the level of dispute in the findings. Redress engages immediately on receipt of the audit notification and controls the audit firm's data requests from day one, which significantly compresses the timeline compared to providers who respond reactively.
We need the Microsoft audit notification letter, your SPLA agreement and recent monthly report history, and a summary of the customer environments covered by your SPLA. We can begin the immediate defence response with just the notification letter and SPLA agreement. Full historical reporting data is gathered and reviewed as the engagement develops.
Yes. We regularly engage mid-audit where providers have been self-managing the process and the audit firm's findings have reached a stage requiring expert challenge. We review all data already shared with the audit firm, assess the findings produced so far, and take over the commercial defence from that point. Earlier engagement produces better outcomes, but mid-audit intervention consistently reduces exposure versus accepting the audit firm's initial position.
Microsoft rarely terminates a SPLA agreement during an active audit — their commercial interest is in recovering back-billing, not eliminating a revenue-generating relationship. Redress ensures the audit process does not give Microsoft grounds for termination by managing all data disclosures carefully, maintaining your monthly reporting obligations during the audit period, and keeping the commercial dialogue focused on settlement. None of our clients has lost their SPLA agreement through an audit we have managed.
Right-size M365, Azure, and EA spend before the next True-Up.
Independent EA renewal advisory delivering 10–25% savings.
Manage Microsoft licensing exposure through mergers and acquisitions.
SPLA compliance guides, reporting frameworks, and audit intelligence.
Fixed fee, contingency, and always-on advisory options.
Independent market data for Microsoft licensing and settlement benchmarks.