Azure Container Registry Admin Username
You have an Azure subscription that contains an Azure container registry named ContReg1. You enable the Admin user for ContReg1. Which username can you use to sign in to ContReg1?
Community Votes
100% of anonymous learners picked answer D. Votes are pick records left by other test-takers — they are not the verified answer.
Community Insight
The ACR admin account uses the registry name as the username, not generic terms like 'admin' or 'root'.
When you enable the admin user for an Azure Container Registry, the username for authentication is the name of the registry itself. This page establishes that for a registry named ContReg1, the sign-in username is ContReg1.
Choosing 'admin' (Option B) because it seems intuitive for an 'admin user' account, but ACR specifically uses the registry name as the username.
Community Discussion (11 comments)
Comments & Corrections
No comments yet — spotted an error or have a note? Share it below.
Expert Analysis
Why the Answer Is Correct
When the admin user is enabled on an Azure Container Registry (ACR), Azure automatically assigns the registry's name as the username for that admin account. Therefore, for a registry named ContReg1, the username used to sign in is exactly ContReg1, making Option D correct. This design ensures that admin credentials are uniquely tied to each specific registry instance.Why the Other Options Are Wrong
Options A ("root"), B ("admin"), and C ("administrator") are incorrect because ACR does not use these generic usernames for its admin account. While other systems might default to "admin" or "root", Azure Container Registry explicitly sets the username to match the registry name. This avoids conflicts and provides registry-specific credentials, rendering the generic options invalid.Community Comment Notes
Several community members confirmed through lab testing that the username matches the registry name, as Andreas_Czech noted when saying "the admin user is identical to the Name of the Container Registry". Others who selected "admin" likely confused ACR with other services that use generic admin usernames. However, danlo correctly pointed out that "you can use the registry name as username and admin user access key as password".Official Reference
Exam Strategy
Remember that Azure Container Registry admin credentials are unique; the username is always the registry name, not a generic string like "admin". When you see "Admin user" in the context of ACR, immediately associate it with the registry's specific name.
Related Analysis
Practice All AZ-104 Questions
Access 100 questions with complete answers and detailed explanations.
View Full AZ-104 Practice Test →