Microsoft’s SECRET to Making Old Apps Work in the Cloud? Entra Kerberos Explained

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You Should Know:

1. Understanding Entra Kerberos

Entra Kerberos bridges on-premises Active Directory (AD) and cloud-based Entra ID, enabling legacy apps (e.g., SMB file shares, Azure Files) to authenticate seamlessly in hybrid environments.

Key Modes:

  • Up-Level Trust: Uses modern cloud-based Ticket Granting Tickets (TGTs) with Windows Hello.
  • Down-Level Trust: For legacy systems still dependent on traditional Kerberos.

Setup Commands (PowerShell):

 Check Entra Kerberos Trust Status 
Get-AzureADKerberosServer

Configure Trust Relationship 
New-AzureADKerberosServer -DomainName "yourdomain.com" -TrustType "UpLevel"

2. MAM (Mobile Application Management) on Edge

Secures personal devices accessing corporate data via Microsoft Edge without full MDM enrollment.

Intune Policy Deployment:

 Create MAM Policy for Edge 
New-IntuneMAMPolicy -DisplayName "Edge MAM Policy" -AppGroupId "com.microsoft.edge"

Linux/Mac Equivalent (via Conditional Access):

 Check Azure AD device compliance (Linux) 
az login 
az account get-access-token --resource https://graph.microsoft.com

3. Practical Kerberos Commands (Linux/Windows)

Windows (klist & ksetup):

klist purge  Clear Kerberos tickets 
ksetup /addkdc YOURDOMAIN.COM dc.yourdomain.com

Linux (kinit & klist):

kinit [email protected]  Request Kerberos ticket 
klist -e  View cached tickets

What Undercode Say:

Entra Kerberos is a game-changer for hybrid environments, reducing reliance on NTLM (vulnerable to attacks like Pass-the-Hash). Future support for Mac/Linux will expand its reach.

Security Tip: Always enforce Conditional Access alongside Entra Kerberos: 

 Enable MFA for legacy apps 
New-AzureADConditionalAccessPolicy -DisplayName "Kerberos MFA" -State "Enabled"

Prediction: Cloud-only Kerberos will replace on-prem AD for most enterprises by 2027.

Expected Output:

  • Hybrid Auth Success: Legacy apps work in the cloud.
  • Secure Edge Browsing: MAM policies protect data on personal devices.
  • Future-Proofing: Entra Kerberos paves the way for cloud-only AD.

Relevant URLs:

References:

Reported By: Merill Have – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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