Does Enabling ACR Admin User Meet Container Instance Deployment Goal?

Provision and manage containers in the Azure portal
Answer Correct answer: A — Enabling the Admin user on Registry1 provides the credentials needed for the portal to deploy a container instance from image1.

Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution. After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen. You have an Azure container registry named Registry1 that contains an image named image1. You receive an error message when you attempt to deploy a container instance by using image1. You need to be able to deploy a container instance by using image1. Solution: You set Admin user to Enable for Registry1. Does this meet the goal?

  1. Yes Correct Answer
  2. No

Community Votes

A
100%

100% of anonymous learners picked answer A. Votes are pick records left by other test-takers — they are not the verified answer.

Community Insight

Tests ACR authentication for Azure Container Instances; the trap is assuming enabling admin user alone is insufficient without passing credentials manually, but the portal uses admin credentials automatically.

This AZ-104 scenario asks whether enabling the admin user on an Azure Container Registry (Registry1) allows a container instance to deploy image1. The answer is Yes: the Azure portal requires the registry's admin account to authenticate and pull the image from ACR.

Learners often answer No, thinking you must also configure registry credentials in the container instance; however, when deploying via the portal, enabling the admin user is the required step that provides the credentials.

Community Discussion (3 comments)

Elite4Life 👍 7 Selected: A
Enabling the Admin user for the Azure Container Registry (Registry1) provides credentials that can be used to authenticate when pulling images from the registry. If authentication was the issue preventing the deployment, then enabling the Admin user and using its credentials should resolve the problem, allowing you to successfully deploy the container instance using image1. Therefore, this solution would meet the goal.
lumax007 👍 1 Selected: A
When using the portal to deploy a container instance from a container registry, you must enable the registry's admin account.
arunyadav09 👍 3 Selected: A
https://learn.microsoft.com/en-us/azure/container-instances/container-instances-using-azure-container-registry If you deploy through Azure portal a container instance from a container registry, you must enable the registry's admin account.

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Expert Analysis

Why the Answer Is Correct

Enabling the Admin user on Registry1 generates a username and password that Azure Container Instances can use to authenticate to the registry. In the Azure portal, when you deploy a container instance and select an image from an Azure Container Registry, the portal uses the registry's admin credentials by default. If the admin user is disabled, the portal cannot pull image1 and the deployment fails with an authentication error. Setting Admin user to Enable therefore resolves the authentication issue and allows the deployment to succeed. This is exactly the prerequisite that the solution aims to satisfy.

Why the Other Options Are Wrong

Option B ("No") would only be correct if enabling the admin user were irrelevant or insufficient for the deployment. However, the scenario's error stems from the registry denying access to image1 because no admin credentials were available. The portal automatically consumes the admin user credentials once enabled, so no additional manual credential configuration is required for a portal-based deployment. Thus, answering "No" mischaracterizes the role of the admin account in this flow.

Community Comment Notes

Community voters unanimously chose Yes, and their explanations align with the official behavior. Elite4Life noted that enabling the admin user provides credentials for pulling images, which resolves authentication issues. Arunyadav09 shared a Microsoft Learn link and stated that "you must enable the registry's admin account" when deploying through the portal. Lumax007 reinforced that the portal requires the registry's admin account to be enabled. These comments support the conclusion that the solution meets the goal.

Official Reference

Exam Strategy

For ACR authentication questions, note whether the deployment method is portal or CLI. Portal deployments can use the registry's admin user automatically once enabled, while CLI deployments need explicit --registry-username and --registry-password values.

Frequently Asked Questions

Why is enabling the ACR admin user enough to fix the container instance error?

The Azure portal automatically uses the registry's admin credentials to pull the image when you select an Azure Container Registry image for a container instance.

Does enabling admin user work for CLI-based ACI deployments too?

No, CLI deployments require explicit --registry-username and --registry-password; enabling the admin user alone does not pass credentials.

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