Organisations should convert access to just-in-time when a group exists mainly for occasional or task-specific use, especially if members do not touch the assigned resources for long periods. JIT is a good fit when the business needs access flexibility but not continuous entitlement. It reduces standing privilege while keeping access available on demand.
Why This Matters for Security Teams
Group-based access often starts as a convenience control, then quietly becomes standing privilege. That is a problem when the group exists only for intermittent tasks, short-lived projects, break-glass support, or periodic operations. The longer access stays permanent, the more it expands the blast radius of account compromise, misuse, and forgotten entitlements. This is especially visible in environments where OWASP Non-Human Identity Top 10 risks overlap with human and service-account workflows.
NHI Management Group’s Ultimate Guide to NHIs notes that 97% of NHIs carry excessive privileges, which is the same structural issue that often appears when teams leave group entitlements in place after the original use case has passed. Permanent access is easiest to justify during provisioning, but hardest to defend during audit, incident review, or privilege review. In practice, many security teams discover that a “temporary” group has become a permanent exception only after an access review, an outage, or a security event forces the question.
How It Works in Practice
The decision point is not whether a group is useful, but whether continuous entitlement is necessary. If access is only needed for a maintenance window, an approval-based task, a migration, or an on-call event, then just-in-time access is usually the better model. Instead of assigning the user or workload to a standing group, the organisation grants access at request time, for a limited duration, and with automatic expiry. That aligns with the principle of least privilege in NIST SP 800-53 Rev 5 Security and Privacy Controls.
Operationally, the change usually follows a pattern:
- Identify groups with low activity or intermittent usage over a defined review period.
- Confirm the business event that actually requires access, such as ticket-driven support or scheduled operations.
- Replace standing membership with approved elevation, time-bound access, or task-scoped entitlement.
- Set expiry windows that match the work, not the identity lifecycle.
- Log every elevation and require reauthorization for repeated use.
For non-human identities, this works best when access is tied to workload identity, short-lived tokens, and clear revocation paths rather than shared credentials. NHI Management Group’s Key Challenges and Risks material is useful here because it highlights how excessive privileges and poor lifecycle control create durable exposure even when the original use case was legitimate. Current guidance suggests converting groups to JIT when the same access can be reapproved on demand without harming operations. These controls tend to break down in legacy systems that cannot issue time-bound entitlements or enforce expiration cleanly because the directory itself is the only authorization layer.
Common Variations and Edge Cases
Tighter access control often increases operational overhead, requiring organisations to balance reduced standing privilege against support friction and approval latency. That tradeoff is real, especially for production support, emergency access, and cross-functional teams that need fast response.
There is no universal standard for this yet, so the best practice is evolving. Some groups should remain permanent because the role itself is continuous, such as core platform administration, but even then the access should be narrow and monitored. Other groups look permanent only because no one has revisited the original business need. For example, a quarterly reporting group, a seasonal operations team, or a vendor support cohort should usually move to JIT if access can be reliably reconstructed when needed. NHI Management Group’s Guide to NHI Rotation Challenges is relevant when access must be repeatedly reissued, because poor rotation discipline often indicates the entitlement should not have been standing in the first place.
Permanent access may still be justified when the workflow is continuous, latency-sensitive, and tightly monitored, but the decision should be documented and reviewed. If the team cannot explain why standing access is needed on an ongoing basis, that is usually the strongest signal to convert it to JIT.
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 address the attack and risk surface, while NIST CSF 2.0, NIST SP 800-63, NIST Zero Trust (SP 800-207) and NIST AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-03 | Standing group access often becomes excessive privilege needing periodic reduction. |
| NIST CSF 2.0 | PR.AC-4 | Least privilege and access restriction directly support JIT conversion decisions. |
| NIST SP 800-63 | AAL | Strong identity assurance matters when access is granted dynamically at request time. |
| NIST Zero Trust (SP 800-207) | Access decisions | Zero Trust favors context-aware, time-bound authorization over permanent trust. |
| NIST AI RMF | Risk governance helps decide when standing access is unjustified. |
Assess recurring access needs as a governance risk and require documented justification for permanence.
Related resources from NHI Mgmt Group
- What do organisations get wrong when they treat access requests as a one-time approval instead of an ongoing control?
- Why do organisations need recurring user access reviews instead of one-time cleanup projects?
- What breaks when access requests are handled with manual approvals and permanent group membership?
- Why do organisations need direct remediation for risky access instead of relying only on review queues and manual follow-up?
