Conditional Access Problems

How to Fix Azure CLI Authentication Failure on a Virtual Machine

Elise Williams Oct 1, 2026 869 views

Question details

The user is experiencing Azure CLI device-login authentication failures on a virtual machine due to Microsoft Entra ID policy restrictions.

How to Fix Azure CLI Authentication Failure on a Virtual Machine

Product: Azure CLI
Device & OS: not provided
Scenario: Attempting to authenticate into Azure CLI using a virtual machine environment.
Observed behavior: Authentication fails because Microsoft Entra ID Conditional Access policies restrict the browser, application, device, or sign-in location.

Before you start

Ensure you have access to your Azure tenant details and the contact information for your organization's Microsoft Entra ID administrator.

Solution 1Recommended

Review Sign-in Errors and Conditional Access Policies

Work with your IT administrator to identify and resolve the specific Conditional Access policy blocking your authentication request.

Azure CLI authentication failures on virtual machines are typically handled at the organizational level. Because Conditional Access policies enforce strict requirements on devices, IPs, and applications, you must verify these settings with your administrator to restore access.

Check the sign-in error logs

Note the exact error message and correlation ID provided in the terminal when the Azure CLI device-login fails.

Contact your Microsoft Entra ID administrator

Provide the correlation ID to your administrator so they can look up the blocked sign-in attempt in the Azure Portal logs.

Verify access requirements

Confirm with your admin that your virtual machine's IP address, your user account, and the Azure CLI application meet the required Conditional Access policies.

Consult Microsoft Q&A

If the issue persists and policies seem correct, post the technical details and error logs to the Microsoft Q&A forums for expert Azure troubleshooting.

Review Sign-in Errors and Conditional Access Policies

Alternative Authentication: Consider using a System-Assigned or User-Assigned Managed Identity for your virtual machine, which securely bypasses many interactive login restrictions.

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Frequently Asked Questions

Why does Azure CLI authentication work on my local computer but fail on a virtual machine?

Conditional Access policies evaluate sign-in context such as device compliance and IP location. Your local machine may be recognized as a compliant corporate device, whereas the virtual machine might be on an untrusted network or not joined to your organization's domain.

How can I find out which Conditional Access policy is blocking me?

Only administrators with the appropriate permissions can view the detailed sign-in logs in the Microsoft Entra ID (Azure AD) portal. They can navigate to 'Sign-in logs', select the failed login attempt, and check the 'Conditional Access' tab to identify the blocking policy.

Is there a way to authenticate Azure CLI on a VM without user interaction?

Yes. The recommended approach for virtual machines is to enable a Managed Identity. You can then authenticate using the command 'az login --identity', which operates independently of interactive Conditional Access policies designed for users.

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