A developer reports 'unauthorized: authentication required' when pulling, three hours after running az acr login. What is happening?
- A The registry firewall blocked their IP
- B The ACR access token has expired and they must re-authenticate (correct answer)
- C Content Trust rejected the image
- D The repository was deleted
Shortcut: Tokens issued by az acr login are valid for roughly three hours. For long-running automation, use a service principal or managed identity instead of an interactive login.