Microsoft Entra Agent ID: Building a Safer Lifecycle for AI Agent
Microsoft Entra Agent ID: Building a Safer Lifecycle for AI Agent Identities
Managing inactive agent identities with the default inactivity policy
Introduction
AI agents are becoming part of enterprise IT environments. They can automate workflows, interact with applications, and access organizational data with limited human intervention.
But there is an identity management challenge that deserves attention: what happens to an agent's identity when the project ends, the business process changes, or nobody remembers that the agent still exists?
An identity that is no longer needed should not remain unmanaged indefinitely. The same principles that apply to user accounts and service identities should also guide how organizations manage AI agent identities.
Microsoft Entra Agent ID introduces identity and lifecycle governance capabilities designed for this emerging area. One useful starting point is the default agent identity inactivity policy, which helps organizations manage agent identities that have not been used for an extended period.
In this guide, we'll look at how the policy works, how to configure it, and how to approach it from an IT administration and security perspective.
Why Inactive Agent Identities Matter
Imagine an organization creates an AI agent to support a project, automate a reporting process, or assist with an internal workflow.
The project finishes, but the agent identity remains in Microsoft Entra. Over time, the team responsible for the agent may change, its purpose may be forgotten, or its permissions may no longer reflect the organization's requirements.
This creates several challenges:
- Identity sprawl: Administrators lose visibility into which agent identities are still required.
- Ownership gaps: Nobody may be accountable for reviewing the agent's continued use.
- Excessive access: Permissions may remain in place after the original business requirement has disappeared.
- Operational disruption: An agent that appears inactive may still support a legitimate process that runs infrequently.
The important distinction is that an inactive identity is not automatically a compromised identity or an unnecessary identity. Inactivity is a signal that should trigger governance, not replace it.
Automating this process can help IT teams identify identities that need attention without relying entirely on manual directory reviews.
Understanding the Default Inactivity Policy
Microsoft Entra provides a default lifecycle policy for agent identities that have not been active for a defined period. The policy follows three stages:
| Inactivity period | Action |
|---|---|
| 60 days | Notify owners and sponsors |
| 90 days | Disable the agent identity |
| 455 days | Delete the agent identity |
The policy uses predefined timeframes that cannot be customized.
Microsoft defines inactivity in this context by the absence of token issuance for the agent identity during the relevant period. An agent that has not received a token may therefore be considered inactive even if its business purpose has not changed.
This distinction matters for agents used only occasionally. A process that runs annually, for example, could appear inactive between scheduled executions.
The notification stage provides an opportunity for the responsible people to review the identity before the policy progresses to further enforcement.
Prerequisites and Licensing
Before enabling the default inactivity policy, review the required administrative permissions and the current Microsoft documentation.
Microsoft documents the following roles for configuring the default policy:
- Lifecycle Workflows Administrator
- AI Administrator
- Agent ID Administrator
The default inactivity policy is documented as available without an additional license requirement.
Do not confuse this with custom agent lifecycle policies. Custom lifecycle governance has separate licensing requirements, and other Agent ID capabilities may require additional licenses.
References:
1Inventory Your Agent Identities
Before enabling automated enforcement, understand which agent identities exist in your tenant.
- Sign in to the Microsoft Entra admin center.
- Navigate to
Entra ID > Agents > Agent identities. - Review the identities listed in your environment.
- Investigate identities that have unclear ownership, sponsorship, or purpose.
Where available, examine the identity's status, object ID, owners, sponsors, permissions, and sign-in activity. Use this review to identify:
- Agents associated with completed projects.
- Agents with no clearly accountable owner or sponsor.
- Agents that are used infrequently.
- Agents with access to sensitive resources.
- Agents that support critical business processes.
Remember that the Agent identities view is not necessarily a complete inventory of every AI application or automation in your organization. An AI solution may use a different identity model, so discovery should also account for the architecture of your environment.
2Locate the Default Policy
After reviewing the inventory, open the lifecycle policy configuration.
- Sign in to the Microsoft Entra admin center using an appropriate role.
- Navigate to
ID Governance > Lifecycle Workflows > Lifecycle Policies > Agent ID (Preview). - Open Default Agent Identity Inactivity Lifecycle Policy.
- Select Policy Configuration.
The available options allow you to review the policy and configure its scope before enabling it.
Portal labels and navigation may change while the feature is in preview, so refer to the current Microsoft Learn instructions if your tenant displays a different interface.
3Review the Policy Scope
The policy provides two scope options.
All Agent IDs
This applies the policy to all agent identities included in its scope. It can be suitable when the organization has reviewed its agent inventory and established that the default inactivity process is appropriate for those identities.
All Agent IDs Except Selected
This allows specific agent identities to be excluded from the policy. Consider exclusions for identities that:
- Support seasonal business operations.
- Are used only for annual or infrequent processes.
- Must be retained for a documented business requirement.
- Require a different lifecycle management approach.
Select the appropriate scope and review the exclusions before saving.
Avoid creating broad exclusions simply because an identity is difficult to assess. Investigate its purpose and permissions first, and document why an exception is necessary.
4Configure Fallback Notification Recipients
The policy can notify owners and sponsors when an agent identity reaches the notification stage. However, an identity may not have an appropriate owner or sponsor available to respond.
Microsoft supports fallback notification recipients for these situations, including group mailboxes. When configuring the policy, review the fallback recipient settings and specify an appropriate monitored address where required.
For example, an IT identity governance mailbox may be suitable if the team has an established process for reviewing and assigning incoming notifications.
A notification is useful only if somebody is responsible for acting on it. Define who investigates the identity, confirms its business purpose, and decides whether it should remain active.
5Enable and Save the Policy
Once the inventory, scope, and notification arrangements have been reviewed:
- Open Default Agent Identity Inactivity Lifecycle Policy.
- Select Policy Configuration.
- Enable Enable Policy.
- Review the scope and selected exclusions.
- Verify the notification configuration.
- Select Save.
The policy then evaluates agent identities within its scope according to the service's evaluation process.
Do not assume that saving the configuration immediately means every identity has been evaluated or every notification has been delivered. Verify the resulting behavior and allow for the service's evaluation cycle.
Because the feature is in preview, confirm its current availability and behavior in your tenant before making it part of a production governance process.
6Validate the Configuration
A successful configuration is not just a policy showing as enabled. Administrators should also verify that the policy scope and notification process match the intended outcome. Use this checklist before considering the configuration complete:
- ☐ Confirm that the policy is enabled and saved.
- ☐ Verify which agent identities are included.
- ☐ Review all excluded identities and document the reason for each exclusion.
- ☐ Confirm that owners and sponsors are assigned where appropriate.
- ☐ Verify that fallback recipients are monitored.
- ☐ Establish a process for investigating inactivity notifications.
- ☐ Identify business-critical agents that require additional review.
- ☐ Document the policy's preview status and associated risks.
Where possible, validate the behavior using a limited, appropriate test scope before considering broader adoption. Follow Microsoft's current guidance for testing the default policy, and do not deliberately allow a business-critical identity to reach an enforcement threshold just to prove that the policy works.
What Happens When an Agent Is Disabled or Deleted?
Disabling an agent identity can prevent the agent from authenticating or operating as expected. Any dependent workflow may fail until the identity is restored or an alternative is configured.
Deletion has more serious consequences because the identity may no longer be available in its original state.
Microsoft's documentation states that an owner or administrator can restore an agent identity where recovery is supported. A sponsor alone cannot re-enable or restore the identity.
This is why ownership, sponsorship, and exception management should be established before enabling automated enforcement.
If an identity has already been disabled, investigate its business purpose and dependencies before restoring it. If deletion has occurred, follow Microsoft's supported recovery procedures rather than assuming that restoration will always be possible.
Default Policy or Custom Lifecycle Policy?
The default inactivity policy is a straightforward starting point for organizations that want a predefined approach to inactivity.
Custom agent lifecycle policies provide more flexibility for organizations that need governance rules tailored to their requirements. Depending on licensing and the capabilities available in the tenant, these policies can include rules for inactivity, periodic reconfirmation, and minimum sponsor requirements.
For example, an organization may want sponsors to periodically confirm that an agent is still required, even if the agent remains technically active. Custom policies can also support more specific enforcement actions, notification behavior, and policy scopes.
However, additional flexibility brings additional configuration and governance responsibilities. Review policy scope, priority, and enforcement behavior carefully if multiple lifecycle policies apply to the same identities.
Reference: Microsoft Entra Agent ID lifecycle policies
My Recommendations for IT Administrators
I would approach agent inactivity governance in the following order.
1. Establish accountability before automation
Make sure the organization knows who owns each agent and who is responsible for its continued use. An automated policy cannot replace a clear business owner.
2. Review permissions separately from inactivity
An active identity can still have excessive permissions, while an inactive identity may be legitimate. Review access according to least-privilege principles rather than relying on activity alone.
3. Treat exclusions as managed exceptions
Record why an agent is excluded, who approved the exception, and when it should be reviewed again.
4. Make notifications actionable
Assign responsibility for investigating notifications. Without a defined process, notifications can become another unattended IT queue.
5. Validate before broad adoption
Because the lifecycle policy is in preview, start with a controlled evaluation and document the results. Consider the potential effect on business-critical workflows before enabling broad enforcement.
6. Revisit the approach as adoption grows
As more teams develop and deploy agents, review whether the default policy is sufficient or whether the organization needs more comprehensive lifecycle governance.
Final Thoughts
AI agents need more than a successful deployment. They also need clear ownership, appropriate permissions, and a defined lifecycle.
Microsoft Entra Agent ID's default inactivity policy provides a way to address identities that remain unused over time. Its predefined notification, disablement, and deletion stages can help organizations establish a consistent process for managing inactive agent identities.
But automation is only part of the solution. The real value comes from combining lifecycle controls with identity discovery, least-privilege access, clear accountability, and a process for reviewing exceptions.
My recommendation is to begin with an inventory, understand the policy's impact, and validate the configuration before considering wider adoption. That approach helps IT teams improve identity governance while reducing the risk of disrupting legitimate AI-driven business processes.
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