Resilience by Design: Automating Credential Lifecycle Audits in Entra ID

Introduction: Operational Resilience is a Mandate, Not a Choice

In the current regulatory landscape for European financial institutions, “operational resilience” is more than just a buzzword—it is a legal mandate. As we navigate the requirements of the Digital Operational Resilience Act (DORA) and the NIS2 Directive, one of the most critical, yet often overlooked, components of a secure ecosystem is the Workload Identity Lifecycle.

The Shift to Short-Lived Identities

For years, the industry standard was often “set and forget.” However, in a modern Zero Trust architecture, static credentials (secrets and certificates) that persist for years represent a significant lateral movement risk.

As we approach several major platform milestones in early 2026, many organizations are taking the opportunity to transition from legacy static secrets to modern federated identities. The first step in this modernization journey is gaining clear visibility into the current state of “Long-Lived” credentials across the tenant.

Why Audit for Long-Lived Credentials?

In a high-compliance environment, a credential with a lifetime exceeding 24 months is increasingly viewed as a technical debt item. There are three primary reasons to audit for these today:

1. Risk Surface Reduction: Long-lived secrets are more susceptible to “credential harvesting” over time.
2. Audit Preparedness: Frameworks like PCI-DSS v4.0 and DORA emphasize the need for verifiable access control and regular rotation.
3. Modernization Readiness: Identifying where secrets are still in use allows teams to prioritize the migration to Workload Identity Federation (WIF) or Managed Identities.

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The Baseline Health-Check Script

To support this proactive visibility, I utilize a “Credential Resilience” script. This tool identifies active credentials with a lifetime greater than 730 days, allowing security architects to prioritize them for modernization.

<#
.SYNOPSIS
    Baseline Health Check: Entra ID Credential Lifetime Audit.
.DESCRIPTION
    Identifies app credentials (Secrets/Certificates) with lifetimes > 2 years.
    This is used to identify candidates for migration to Workload Identity Federation.
#>

# Connect with necessary audit scopes
Connect-MgGraph -Scopes "Application.Read.All","Directory.Read.All"

# Define output path for the internal compliance report
$ReportPath = "D:\EntraID\Audit\Reports\Credential_Lifetime_$(Get-Date -Format 'yyyyMMdd').csv"
$CurrentTime = Get-Date

Write-Host "🕵️ Scanning Entra ID for long-lived credential baselines..." -ForegroundColor Cyan

$Applications = Get-MgApplication -All -Property "id,displayName,appId,passwordCredentials,keyCredentials"

$HealthCheckResults = foreach ($App in $Applications) {
    # Analyze both Secrets and Certificates
    $AllCredentials = $App.PasswordCredentials + $App.KeyCredentials
    
    foreach ($Cred in $AllCredentials) {
        if ($null -ne $Cred.StartDateTime -and $null -ne $Cred.EndDateTime) {
            $TotalLifetime = ($Cred.EndDateTime - $Cred.StartDateTime).Days
            
            # Identify active credentials exceeding the 24-month industry recommendation
            if ($TotalLifetime -gt 730 -and $Cred.EndDateTime -gt $CurrentTime) {
                $Type = if ($Cred.AdditionalProperties.ContainsKey("hint")) { "Secret" } else { "Certificate" }
                
                [PSCustomObject]@{
                    ApplicationName = $App.DisplayName
                    ApplicationId   = $App.AppId
                    CredentialType  = $Type
                    LifetimeDays    = $TotalLifetime
                    DaysUntilExpiry = ($Cred.EndDateTime - $CurrentTime).Days
                    Status          = "Modernization Candidate"
                }
            }
        }
    }
}

$HealthCheckResults | Export-Csv -Path $ReportPath -NoTypeInformation
Write-Host "✅ Health Check Complete. Report generated at: $ReportPath" -ForegroundColor Green

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Moving Toward a “Secret-less” Future

If your health check identifies a significant number of long-lived credentials, the goal isn’t just to rotate them. The 2026 goal is to evolve them.

1. Workload Identity Federation (WIF)

For workloads running on external platforms (GitHub, AWS, GCP, or Kubernetes), WIF is the gold standard. It replaces static secrets with short-lived tokens based on a trust relationship. No secrets mean no audit findings.

Using Workload Identity Federation eliminates secret management complexity and aligns your CI/CD pipelines with DORA compliance.

2. Managed Identities

For anything running within Azure/Entra environments, Managed Identities should be the default. They eliminate the need for credential management entirely, as Entra ID handles the rotation behind the scenes.

3. Application Management Policies

To prevent the recurrence of long-lived secrets, organizations can now use Entra ID Application Management Policies. These allow you to set a hard limit (e.g., 180 or 365 days) on any new secret created in the tenant, ensuring the environment stays resilient by default.

Conclusion

In the modern threat landscape, resilience is a continuous process. Automating your credential lifecycle not only ensures compliance but also minimizes your attack surface in the event of a breach.