How can teams tell whether DSPM is improving Microsoft 365 governance?

Why This Matters for Security Teams

DSPM is only useful for Microsoft 365 governance if it changes what reviewers can prove, not just what they can see. Security teams often discover that SharePoint, OneDrive, Teams, and Exchange contain sensitive content long after access sprawl has already taken root. That matters because governance failures usually show up as over-shared workspaces, stale permissions, and weak evidence during recertification. The NIST Cybersecurity Framework 2.0 is clear that governance should support risk-informed decisions, while NHIMG’s Top 10 NHI Issues shows how visibility gaps and over-privilege tend to persist when identity and data controls are managed separately. In Microsoft 365, DSPM should help close that gap by connecting data sensitivity to who can access it and why.

One relevant signal from The State of Non-Human Identity Security is that 85% of organisations lack full visibility into third-party vendors connected via OAuth apps, which is a reminder that governance breaks down quickly when access paths are not fully understood. In practice, many security teams only realise DSPM has failed after a recertification cycle produces cleaner-looking reports but no real reduction in exposure.

How It Works in Practice

To judge whether DSPM is improving Microsoft 365 governance, teams should look for operational changes across the data and identity lifecycle. The first test is coverage: can DSPM reliably discover where sensitive data lives across Teams, SharePoint sites, OneDrive accounts, and mailboxes? The second test is classification quality: are labels, sensitivity tags, or content types accurate enough to drive access decisions? The third test is decision support: do reviewers get evidence that helps them remove access, narrow sharing, or enforce retention, rather than a flood of findings they cannot action?

In a mature workflow, DSPM should feed governance processes such as access reviews, external sharing reviews, lifecycle management, and exception handling. That means:

• finding unknown or unmanaged repositories before they become persistent risk
• identifying over-shared sites and links with broad or anonymous access
• highlighting where sensitive content sits outside expected business boundaries
• supporting recertification with evidence tied to actual data exposure
• tracking whether remediation reduces repeated findings over time

For practitioners, the best outcome is not more alerts but less ambiguity. NHIMG’s Ultimate Guide to NHIs - Lifecycle Processes for Managing NHIs reinforces the value of lifecycle control, and that same logic applies here: discover, classify, govern, review, and remove excess access. Where DSPM is working, governance teams can show that data sensitivity is aligned to access scope and that exceptions are becoming shorter-lived. These controls tend to break down in heavily federated Microsoft 365 estates because ownership is fragmented across business units and external sharing decisions are made faster than governance reviews can keep up.

Common Variations and Edge Cases

Tighter DSPM often increases review overhead, so organisations must balance stronger visibility against the risk of alert fatigue and slower remediation. Best practice is still evolving on how much automation should be allowed in Microsoft 365 governance, especially when sensitivity classification is imperfect or business teams rely on broad collaboration by design.

Some environments will see good DSPM coverage but poor governance outcomes because the problem is not discovery, it is policy enforcement. Others have strong access controls but weak classification, which means reviewers still cannot tell which sites actually matter. The hardest edge case is guest-heavy collaboration: shared workspaces, external links, and cross-tenant access can make “appropriate access” difficult to judge without additional context. That is why current guidance suggests treating DSPM as evidence for governance, not as the governance decision itself. NHIMG’s Ultimate Guide to NHIs - Regulatory and Audit Perspectives is useful here because it frames the need for defensible controls rather than raw visibility. A strong Microsoft 365 programme should demonstrate fewer unknown stores, fewer over-shared locations, and cleaner recertification outcomes over time.

Related resources from NHI Mgmt Group

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• How can teams tell whether DSPM is actually improving security?
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• How can teams tell whether observability is improving identity governance?