TL;DR: Group sprawl in Microsoft 365 and similar collaboration stacks creates ownership ambiguity, access drift, and security blind spots when teams can create groups without coordination, according to Zluri. The governance issue is not the volume of groups alone, but the loss of control over who creates them, why they exist, and when they should be retired.
At a glance
What this is: This analysis explains how uncontrolled group creation in Microsoft 365 and Teams creates sprawl, obscures ownership, and weakens access governance.
Why it matters: IAM and IGA teams need to treat group creation, ownership, and retirement as governed lifecycle events, or collaboration growth turns into access risk and audit noise.
Context
Group sprawl is the uncontrolled growth of Microsoft 365 and Teams groups without clear purpose, ownership, or retirement discipline. In practice, it creates a governance gap rather than a simple content-management problem, because every new group becomes a potential access decision with its own lifecycle.
The article ties sprawl to decentralised group creation, weak governance policies, shadow IT, and limited visibility. For IAM and IGA teams, the issue is not only how many groups exist, but who is allowed to create them, how membership is justified, and whether old groups are still serving a business purpose.
Key questions
Q: What breaks when Microsoft 365 group creation is not governed?
A: Ungoverned group creation produces redundant access containers, unclear ownership, and stale membership. Over time, teams lose sight of why each group exists and who is responsible for it, which weakens both access control and auditability. The practical failure is not just clutter. It is that the organisation can no longer reliably explain or defend who has access to what.
Q: Why do Microsoft 365 groups create security risk when ownership is unclear?
A: Ownership uncertainty means no one consistently reviews membership, removes obsolete access, or retires abandoned groups. That allows access drift to persist even when the group is no longer needed. In IAM terms, the group remains an active entitlement path without a clear accountable decision-maker, which is exactly how hidden risk accumulates.
Q: How should security teams control Microsoft 365 group sprawl?
A: Start by making group creation a governed event, not a free-form action. Require an owner, a business purpose, and a retirement trigger before a new group exists. Then connect group inventories to periodic access reviews so stale collaboration objects are removed instead of accumulating as hidden access paths.
Q: What is the difference between group sprawl and normal collaboration growth?
A: Normal collaboration growth is intentional and governed, with clear ownership, scope, and retirement rules. Group sprawl happens when new groups are created faster than the organisation can justify, track, and remove them. The difference is whether the collaboration layer still behaves like a managed identity surface or has become an unmanaged entitlement archive.
Technical breakdown
Why Microsoft 365 group creation becomes a governance problem
Microsoft 365 and Teams make it easy for departments to create groups quickly, which is useful until creation happens faster than oversight. Group sprawl emerges when creation rights are broad but ownership, naming, and lifecycle controls are weak. At that point, each group becomes a new access surface, often with duplicate purposes, stale membership, and unclear accountability. The problem is not collaboration itself. It is the absence of a control plane that links group creation to business justification, review, and retirement.
Practical implication: restrict self-service creation where it is not justified and tie new group creation to explicit ownership and purpose.
How ownership ambiguity turns into access drift
When groups are created ad hoc, ownership becomes ambiguous and decisions about membership, content, and retention lose a clear accountable party. That ambiguity allows access drift, because no one feels responsible for removing obsolete members, cleaning up duplicates, or retiring abandoned groups. Over time, the identity graph becomes harder to trust, and access reviews lose value because the object being reviewed may no longer have a clear business owner. In governance terms, this is lifecycle failure, not merely operational clutter.
Practical implication: enforce named ownership and regular recertification for every Microsoft 365 group.
Why centralized approval and automation need to work together
The article points to centralized access request handling, auditing, and automation as mitigations, but these controls solve different parts of the same issue. Approval workflows control whether a group should exist; automation controls whether the lifecycle stays current after creation. Without both, organisations either create too many groups or fail to remove unused ones. The underlying mechanism is simple: sprawl is sustained when governance decisions are manual, fragmented, or too slow for the collaboration tools being used.
Practical implication: combine central approval with automated group review, expiry, and removal workflows.
NHI Mgmt Group analysis
Group sprawl is a lifecycle failure, not a collaboration side effect. The article shows that Microsoft 365 group growth becomes risky when creation is disconnected from ownership, justification, and retirement. That is an identity governance problem because every group carries access and accountability implications. Practitioners should treat group sprawl as a controlled-object lifecycle issue, not a workspace hygiene issue.
Access governance breaks when the control point moves away from IT. Self-service creation is useful only if governance follows the decision. When departments create groups without central oversight, the organisation loses the ability to explain why an access container exists and who is responsible for it. The practical conclusion is that creation rights, ownership, and recertification must be governed together.
Ownership ambiguity creates the conditions for access drift. Once no one is clearly responsible for a group, stale membership and duplicate access persist by default. That makes reviews less reliable and weakens evidence for auditors and security teams alike. The implication for IAM programmes is that group ownership is not metadata, it is a control.
Microsoft 365 group sprawl exposes the limits of manual governance. The article’s recommended response, central approval plus automation, reflects a broader market reality: collaboration platforms now outgrow ticket-driven access administration. Identity teams need policy-driven lifecycle controls that can keep pace with how fast groups are created, duplicated, and abandoned. The field should read this as a call to modernise governance operating models, not simply clean up unused groups.
From our research library:
- Nearly 60% of IT leaders cite restrictive cost and complexity as a weakness of legacy identity governance, according to the 2025 State of Identity Governance Report.
- Read next: NHI Lifecycle Management Guide
What this signals
Identity teams should treat collaboration groups as governed lifecycle objects. Microsoft 365 sprawl is usually a symptom of missing creation policy and weak retirement discipline, not a tooling shortage. Once groups become easy to create but hard to govern, the access model stops reflecting business reality and starts reflecting historical convenience.
Lifecycle controls matter more than raw inventory counts. The operational question is not how many groups exist, but whether each one has an owner, a purpose, and an expiry condition. That is why access governance, recertification, and offboarding need to converge in the same operating model for collaboration platforms.
Group ownership is part of the control, not a descriptive field. When ownership is unclear, review evidence degrades and duplicate access accumulates. Programmes that want cleaner audit outcomes need to make ownership assignment, periodic review, and retirement mandatory outcomes of the group lifecycle.
For practitioners
- Define approved group creation paths Limit who can create Microsoft 365 and Teams groups, and require a business purpose and named owner for each new object.
- Recertify group ownership and membership Review active groups on a fixed cadence to confirm the owner is still accountable and membership still matches the original use case.
- Automate expiry and cleanup workflows Use lifecycle automation to flag inactive groups, route them for review, and remove those that no longer have a valid purpose.
- Centralise access request decisions Route new group requests through a single approval process so creation, entitlement scope, and justification are evaluated consistently.
Key takeaways
- Microsoft 365 group sprawl becomes a security problem when creation is easy but ownership, justification, and retirement are not governed.
- The article shows that unclear ownership and redundant groups create access drift, audit noise, and security blind spots across collaboration environments.
- IAM teams should control group creation, assign accountable owners, and automate lifecycle review so collaboration growth stays governable.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 and MITRE ATT&CK address the attack and risk surface, while NIST CSF 2.0 and CIS Controls v8 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 — Improper Offboarding | Old Microsoft 365 groups become residual access objects when no one retires them. |
| NHI-05 — Overprivileged NHI | Group sprawl expands entitlement scope beyond what teams actually need. | |
| Recommendation — Review abandoned groups under NHI-01 and remove access paths that no longer have a valid business owner. Map Microsoft 365 groups to NHI-05 and reduce membership and creation rights to the minimum necessary scope. | ||
| NIST CSF 2.0 | PR.AA-05 — Access Permissions, Entitlements and Authorizations | The article is fundamentally about governing group-based entitlements in collaboration platforms. |
| Recommendation — Apply PR.AA-05 to review Microsoft 365 group entitlements, ownership, and authorization scope on a recurring basis. | ||
| CIS Controls v8 | CIS-5 — Account Management | Group creation, membership, and cleanup are account and entitlement management functions. |
| Recommendation — Use CIS-5 to govern group lifecycle, ownership, and removal of stale access paths. | ||
| MITRE ATT&CK | TA0007 — Discovery | Sprawl increases the need to discover redundant groups and hidden access paths before they become risk. |
| Recommendation — Use TA0007 to hunt for duplicate or unmanaged groups that broaden access visibility gaps. | ||
Key terms
- Scope Sprawl: Scope sprawl is the accumulation of excessive, duplicated, or stale OAuth permissions across many applications and users. It usually grows when teams approve broad access for convenience and never remove it, leaving a large and poorly understood delegated-access surface.
- Ownership Ambiguity: Ownership ambiguity occurs when no accountable person or team is clearly responsible for an identity. In machine identity governance, it blocks attestation, delays revocation, and weakens incident response. If nobody can answer who owns the account, the account effectively owns itself, which is a control failure.
- Answer Drift: Answer drift is the gradual change in a model’s responses over time, often showing up as reduced consistency or increasing error rates. It can signal degraded grounding, shifting data quality, or prompt and retrieval issues. Monitoring drift helps teams catch reliability problems before they become widespread user-facing failures.
- Lifecycle Governance: Lifecycle governance is the set of controls that cover creation, assignment, review, rotation, and retirement of identities and credentials. For NHIs, it is the difference between a temporary automation asset and a persistent access risk. Strong lifecycle governance keeps ownership and expiry tied to actual business use.
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Published by the NHIMG editorial team on June 11, 2026.
Updated on October 8, 2026.
NHI Mgmt Group, the independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org