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EID-EXP-019 – AI Agent Governance – Automated Decommissioning via Lifecycle WorkflowsTenant Validation 019-01EID-EXP-019-02 - Identifying the "Invisible" AI BackdoorEID-EXP-019-03 - Orchestrating the "Kill Switch" ExtensionEID-EXP-019-04 - Automated Enforcement and ValidationEvidence SummaryEvidence-Based Conclusion

EID-EXP-019 – AI Agent Governance – Automated Decommissioning via Lifecycle Workflows

Category: Identity Governance / Workload Identity Security

Title: AI Agent Governance - Automated Decommissioning Using Lifecycle Workflows

Result: Successfully automated the disabling of over-privileged AI Service Principals using custom extensions.

Risk Rating: Critical (Before Remediation) 

Evidence Scope

This experiment examines the security risk of "Identity Debt," focusing on overprivileged AI Service Principals that remain active after a project ends. It shows how to replace manual offboarding with Microsoft Entra Lifecycle Workflows, which can automatically trigger a "Kill Switch" using Azure Logic Apps and the Microsoft Graph API. 

Tenant Conditions:

  • Microsoft Entra ID tenant with Governance or P2 licensing.
  • One AI Service Principal (AI-Sales-Analyzer-Agent) with User.Read.All or higher permissions.
  • Custom Security Attribute ProjectDeltaTemporary is assigned to the workload.
  • Azure Logic App configured with a System-Assigned Managed Identity.

Tenant Validation 019-01

All evidence in this experiment was collected from the Microsoft Entra ID tenant F11labs with primary domain f11labs.onmicrosoft.com.

Lab supporting evidence

EID-EXP-019-02 - Identifying the "Invisible" AI Backdoor

Control Area: Workload Identity MonitoringObservation: An AI Agent used for a temporary project retains full directory access after the project team has finished their work.Expected Secure State: Non-human identities (NHIs) should be decommissioned immediately upon project completion.Actual Result:

  • The Service Principal remains "Enabled" in the tenant.
  • A leaked secret allows an attacker to perform a directory data dump via PowerShell.
  • No native Entra task exists to automatically "Disable Service Principal".
  • Impact:
  • Permanent backdoor for attackers if secrets are compromised.
  • Increased attack surface from "Shadow AI" integrations.

Lab supporting evidence

EID-EXP-019-03 - Orchestrating the "Kill Switch" Extension

Control Area: Custom Task Extensions / Logic AppsObservation: A Logic App is built to receive a trigger from Entra and execute a PATCH command to Microsoft Graph.Expected Secure State: The automation should be secured without using additional secrets (Managed Identity).Actual Result:

  • Logic App is configured with an HTTP trigger.
  • Authentication: Uses System-assigned managed identity with the Audience set to [https://graph.microsoft.com](https://graph.microsoft.com).
  • Permissions: Managed Identity is granted to the Application.ReadWrite.All to allow account status modification.
  • Impact: This approach offers a secure, serverless way to expand Entra's built-in governance features.
  • Evidence Artifact: image_65f504.png (Logic App HTTP configuration showing headers and body).
  • Lab supporting evidence

EID-EXP-019-04 - Automated Enforcement and Validation

Control Area: Lifecycle Workflow ExecutionObservation: An on-demand Lifecycle Workflow is triggered to offboard the AI Agent.Expected Secure State: The workflow should successfully trigger the Logic App and flip the accountEnabled status to false.Actual Result:

  • Lifecycle Workflow pings the Logic App Custom Extension.
  • Logic App history shows a Succeeded status.
  • Subsequent PowerShell breach attempts return a 401 Unauthorized error.
  • Impact:
  • Eliminates manual errors in the offboarding process.
  • Ensures Zero Trust by verifying that the identity is disabled immediately.

Lab supporting evidence

Evidence Summary

019-01Tenant ValidationInformational
019-02Initial Breach SimulationCritical – Unrestricted access via abandoned agent
019-03Custom Extension SetupSuccess – Secure Managed Identity configuration
019-04Automated DecommissioningResolved – Account successfully disabled


Evidence-Based Conclusion

This experiment shows that using Microsoft Entra Lifecycle Workflows with Azure Logic Apps can reduce the risks from over-privileged AI Service Principals. Although Entra does not have a built-in "Disable Workload" task, custom extensions make it possible to set up a strong, automated "Kill Switch." This automation makes sure that when a project ends, the related Non-Human Identities (NHI) are decommissioned, which helps prevent ongoing "Identity Debt" and protects the tenant from leaked workload secrets.

Related Analysis & Fix Guidance

  • Technical Deep Dive: Automating Workload Identity Governance with Graph API
  • MSP Business Impact: Why "Identity Debt" is the #1 threat to your M365 clients in 2026
  • Video Walkthrough: Building the AI Kill Switch - Identity Digest