The first hours of a Microsoft audit set the evidentiary record that every later argument rests on. What you write down on day one, and what you fail to capture, decides whether your position is built on your own contemporaneous notes or on the auditor's reconstruction months later. The customers who defend the most are the ones who treat day one as the start of a case file, not as a moment of panic.
This is a practical record of what to document from the moment a verification arrives, why each item matters, and how to keep the file in a form that holds up when the Effective License Position is negotiated. For the full method, read the Microsoft audit survival guide.
Capture the trigger and the exact wording
Microsoft verifies licensing three ways, and the three are not the same. A SAM engagement is voluntary and sales led. A self verification is a contractual demand you cannot decline. A formal audit runs through a third party accounting firm under the MBSA audit clause. Your first documentation task is to record which of the three has arrived and to preserve the exact wording that established it. Save the original letter or email, the date and time it landed, the named sender, and the program it cites.
This matters because your rights and obligations differ by track, and the auditor's authority is bounded by the clause they invoke. A SAM engagement framed as a free optimization carries no contractual force on its own. A formal audit under the MBSA clause does. If you do not capture the precise basis at the start, you lose the ability to hold the process to its own stated scope later.
The letter is the contract for the process. Preserve it exactly, because every limit you later assert is read from its words.
Open a single source of record
From day one, route everything into one controlled file. Scattered notes across inboxes and chat threads become unusable under pressure. A single, dated, access controlled record gives you one version of events that you can stand behind. It should hold the correspondence log, the data request list, the internal decisions, and the names of everyone involved on both sides.
- A correspondence log with the date, sender, recipient, and a one line summary of every contact
- A data request register that captures what was asked for, on what date, and what was actually provided
- A decision log that records who approved each release of data and on what reasoning
- A contact map naming the Microsoft account team, the auditor, and your own internal participants
Record the scope as the auditor states it
Write down the scope the auditor describes at the outset: the entities in scope, the products in scope, the period under review, and the deployment data they intend to draw on. Microsoft uses its own counting methodology and its own data pulled from Azure, Microsoft 365, and management tooling, so the scope statement tells you which of your environments the calculation will reach. If the scope drifts later, your day one record is what shows it drifted.
Freeze your entitlement evidence early
Your defense rests on entitlement, the licenses you actually hold and the rights that attach to them. Begin assembling that evidence on day one while it is easy to find, not weeks later when the request is urgent. Capture your agreements, your purchase history, your true up records, and any prior negotiated terms. A clean entitlement record is what lets you challenge an Effective License Position that counts deployment without crediting everything you own.
- Current and historical agreements, including the enterprise agreement and any amendments
- License purchase records and reseller confirmations across the period in scope
- Prior true up submissions and any previously agreed positions
- Records of rights that reduce count, such as downgrade, reassignment, and second use
Log every data release before it leaves
The single most consequential discipline is to document what you hand over and why, before you hand it over. Microsoft's calculation governs, and once data is released you cannot unsend it. Recording each release lets you keep what you provide proportionate to what the track actually requires, and it gives you a defensible account of your cooperation. The point is not to obstruct. The point is to make every release a considered decision rather than a reflex.
You can always provide more later. You can never take back what you sent too early.
A simple day one record template
The file does not need to be elaborate. It needs to be consistent and dated. The table below shows the minimum columns that make a record defensible.
| Field | What to capture | Why it matters |
|---|---|---|
| Trigger | SAM, self verification, or formal audit, with the exact citation | Sets the auditor's authority and your obligations |
| Dates | Receipt, deadlines, and every contact | Establishes the timeline you can hold the process to |
| Scope | Entities, products, and period as stated | Lets you show any later drift from the opening scope |
| Data released | Item, date, approver, and reasoning | Keeps releases proportionate and accountable |
What good documentation buys you
When the auditor produces the Effective License Position, it is a reconciliation of deployment against entitlement, and it is not the final sentence. It is negotiated after the report. A disciplined day one file is what makes that negotiation winnable. It lets you credit every entitlement, contest every counting assumption, and hold the process to its stated scope. The contract clause means that if unlicensed use reaches 5 percent or more of total use, you reimburse verification costs and acquire licenses at 125 percent of price, so keeping the calculation honest from the first day has real money behind it.
A buyer side advisor runs this discipline with you from the first hour. We open the record, control the data releases, rebuild the entitlement evidence, and defend the position before Microsoft sets the number. Our guarantee applies: we reduce your exposure or we reimburse our service fee, and with gainshare you pay only from verified savings. If a verification has just landed, the value of the next hour is higher than the value of any hour that follows it.
If you would rather not face that alone, our Microsoft audit defense service sits between you and the auditor from first letter to final settlement.