What is compliance and audit readiness?
Also known as
Definition
Compliance means your Microsoft 365 environment follows the data protection, security, and industry regulations your organization is legally required to meet, such as GDPR, HIPAA, ISO 27001, or your internal policies.
Audit readiness is the operational side. It’s having the controls, evidence, and documentation in place to prove compliance is actually happening. What controls exist, what changed, who had access, and how risks get reviewed or fixed.
Example: An auditor asks who had access to a sensitive SharePoint site six months ago, and why. If the answer takes three days, four people, and a guess, you're compliant in theory and unprepared in practice.
Why it matters
Without readiness, every audit becomes a fire drill: pulling logs, chasing owners. With it, you're describing a process you already run.
- Migration: Migrations can break compliance without anyone noticing. Sensitivity labels lose their encryption and access controls if they don't carry over correctly. Retention settings configured for legal requirements don't automatically follow the data.
- Governance & security: Governance policies don't enforce themselves. Access reviews, sensitivity labels, and retention settings need to be in place, applied consistently, and documented. Without that trail, you can't show whether your controls actually worked when it mattered.
- Day-to-day operations: Less scramble time when an audit lands. More confidence in what you report. Easier conversations with executives who want a straight answer, not a project plan.
Commonly confused with: Security
Security means protecting against actual threats and unauthorized access. They overlap, but they're not the same. You can be fully compliant on paper and still have a real security gap. Audit readiness proves the process happened. It doesn't prove risk is zero.
What we see out there
Drift happens quietly.
Labels, retention rules, and sharing settings don't always get applied the same way across a tenant. As Microsoft adds features and changes defaults, compliance setups drift without anyone noticing until an audit forces a look.
Policies exist. Nobody can prove they’re being followed.
Customers describe having retention labels, naming conventions, and review processes in place, but no way to verify they're actually being applied. When an audit asks for proof, the answer is "we think so."
Audit pressure surfaces risks that were always there.
One organization pursuing ISO 27001 certification suddenly had newly visible data governance risks (files stored insecurely, uncontrolled access, sprawling inactive workspaces) that had always existed but were now under scrutiny. The compliance deadline made the invisible visible.
Frequently asked questions
What evidence should be kept?
At minimum, audit logs showing who accessed or changed what. Microsoft Purview Audit (Standard) keeps those for 180 days by default. Audit (Premium) extends that to one year for Entra ID, Exchange, SharePoint. Other activity logs stay at 180 days unless you configure a custom retention policy. Beyond logs, keep a record of access review decisions, who approved them, and any exceptions made along the way. To learn more, check out Microsoft’s documentation on auditing solutions in Microsoft Purview.
How do access reviews support audits?
An access review that actually gets documented, who reviewed it, what they decided, when, is direct evidence that you're managing access on purpose. Without that record, an auditor just sees a list of permissions with no story behind it. The review is the control. The documentation is the proof it happened.
What changes during a migration?
Retention policies, sensitivity labels, and access history can all behave differently once content gets migrated to a new environment. A label that was correctly applied at the source needs to survive the move intact. Validate this after every migration, not just before.
What should owners document for compliance?
Site and workspace owners should document who has access and why, when it was last reviewed, and what happens if something looks wrong. They should be ready to answer questions like: “What resource is this?” “Who's supposed to have access?” “Who do you call if that needs to change?”
