A Microsoft SAM engagement letter is not a neutral compliance review. It is a commercial operation structured to convert licence gaps into purchase orders. The initial compliance figure Microsoft's audit firm presents is almost always inflated — by miscounted deployments, incorrect product use rights interpretation, and aggressive licensing assumptions. Independent expert defence consistently reduces Microsoft's initial claim by 60 to 85 percent.
Microsoft audit defence is the independent process of challenging every element of Microsoft's SAM engagement: the methodology used to count deployed licences, the product use rights interpretations applied to your configurations, the entitlement offsets Microsoft has not credited, and the settlement figure Microsoft presents as the result.
Microsoft's SAM process is asymmetric by design. Microsoft's audit firm uses Microsoft's own tools, applies Microsoft's most restrictive product use rights interpretations, and presents findings under time pressure designed to limit the organisation's ability to build a counter-analysis. Most organisations that respond to Microsoft SAM engagements without independent expert support pay materially more than their actual compliance gap requires.
The three most consistently productive areas: deployment counting methodology challenges (where Microsoft's tools over-count through virtual environment misinterpretation); entitlement offset recovery (where historical licences, downgrade rights, and SA benefits reduce the gap); product use rights analysis (where Microsoft's default interpretation is contractually challengeable).
The first 30 days are most consequential. We take control from day one: reviewing every data request, establishing audit scope against contractual obligations, managing all communication on your behalf, and setting the timeline on your terms. On a recent healthcare engagement, immediate intervention prevented the client from submitting SQL Server data that would have increased the claim by £1.8M.
We conduct our own independent compliance assessment before Microsoft's audit firm completes theirs. We inventory your Microsoft estate using your actual deployment data, apply the correct product use rights for every configuration, and identify every available entitlement offset.
We challenge Microsoft's audit findings line by line: deployment counts, product use rights interpretations, entitlement offsets. For a financial services client, this reduced the SQL Server and Windows Server claim from £5.6M to £1.2M before any commercial negotiation began.
We negotiate directly with Microsoft's audit team to settle at the lowest defensible figure. We manage the separation of audit settlement from EA commercial terms — ensuring Microsoft cannot use audit leverage to pressure an inflated EA renewal.
SQL Server Virtualisation Counting — Challenging Microsoft's default approach to counting SQL Server licences in VMware or other hypervisor environments, where per-core counting rules frequently produce inflated counts when applied to full host clusters.
M365 Inactive and System Account Counting — Disputing the inclusion of inactive accounts, service accounts, and system mailboxes in the user count that drives M365 licence requirements. Organisations consistently carry 10 to 20% inactive account overhead.
Windows Server and CAL Deployment Counts — Challenging counting of Windows Server licences and Client Access Licences in virtualised or shared device configurations, where methodology often overstates the count.
Product Use Rights and Downgrade Entitlements — Recovering credit for provisions that allow older product versions, cross-edition deployments, or SA benefit conversions that Microsoft's audit firm has not applied.
Azure Hybrid Benefit Mis-Application — Identifying Azure Hybrid Benefit entitlements that have not been applied to Azure VM deployments, reducing the cloud licence claim.
Historical Licence Entitlement Recovery — Identifying perpetual licences from legacy agreements, pre-EA purchases, or acquired entities that reduce the gap between entitlement and deployment.
SAM Tool Output Validation — Reviewing Microsoft's audit tool outputs for configuration errors, duplicate counting, and scope overreach that produces licence counts above actual deployment.
Audit-Commercial Separation — Preventing Microsoft from linking audit settlement to an obligation to purchase additional products or expand the EA.
Typical reduction on Microsoft's initial SAM audit claim through methodology challenge, entitlement offset recovery, and settlement negotiation.
Settlement achieved on a £6.2M Microsoft SQL Server and Windows Server audit claim for a healthcare system — an 85% reduction through methodology challenge and entitlement offset recovery.
Return on Redress advisory fee. Fixed fee agreed before engagement begins, regardless of the size of Microsoft's initial claim.
Own technical compliance position and need independent validation of deployment counts and product use rights.
Responsible for negotiating Microsoft terms and need to separate audit findings from commercial pressure.
Managing ongoing compliance and need expert backup when Microsoft's audit findings don't align with your records.
Accountable for unplanned software spend and need to minimise exposure from audit claims.
Microsoft audit defence is the independent process of challenging Microsoft's SAM methodology, disputing inflated true-up claims, and negotiating settlements that reflect your actual licence position. You need it the moment you receive a SAM engagement letter — the data you submit in the first response significantly shapes the audit trajectory and the final settlement figure.
Fixed-fee, agreed before engagement begins and not increasing based on the size of Microsoft's claim. Most clients achieve 60 to 85% reductions on Microsoft's initial audit claim, delivering 10 to 20x return on the advisory fee.
Microsoft SAM audits typically run for three to nine months from initial notification to final settlement. Redress shortens this by taking control of data flow from day one and driving the settlement process actively.
Provide Microsoft's SAM notification letter, any tools or scripts Microsoft's audit firm has asked you to run, your current EA and product use rights documentation, and any existing licence inventory data. Do not submit deployment data to Microsoft's audit firm before speaking to us.
Yes. We regularly engage mid-audit and consistently identify methodology errors, entitlement offsets, and counting inaccuracies that materially reduce the exposure even with preliminary findings already issued.
Microsoft frequently presents audit settlement as contingent on purchasing additional products or signing an expanded EA. This is a commercial tactic, not a legal obligation. We separate the audit from the commercial conversation entirely and resolve each on its own merits.
Get independent audit defence. Reduce your exposure. Protect your bottom line.
Renegotiate Microsoft EAs at lower cost. Competitive benchmarking, commercial strategy, settlement support.
Right-size M365 deployments. Reduce per-user cost, eliminate inactive accounts, optimise licensing model.
Reduce cloud spend. Reserved Instance strategy, Azure Hybrid Benefit optimisation, cost benchmarking.
Negotiate Microsoft commercial terms. Licensing model optimisation, multi-product bundling, seat strategy.
Challenge SAM methodology. Dispute inflated claims. Reduce audit exposure by 60–85%.
Licensing strategy, deployment architecture, compliance planning, multi-year roadmap.
Choose the service that matches your immediate challenge. Each delivered on a fixed-fee basis with a dedicated advisory team.