Azure OpenAI: Deployment Failure Due to Protection Block — Account Review Needed

Problem description

I am experiencing an issue with my Azure OpenAI deployment. The deployment fails during creation or update, returning a 400 BadRequest error with code 715-123420. The failure occurs during a 'Microsoft.CognitiveServices/accounts/deployments/write' operation, and it appears to be a service-side protection block. I am seeking a review of my account to understand and resolve this protection issue.

Environment

Service: Azure OpenAI; Affected action: deployment create/update at the resource management layer; Region: not specified; Support context: moved from a Developer plan case to a Standard support case.

What I've already tried

I reviewed the Azure Activity Log and retrieved details of the failed deployment request. I confirmed that the deployment was a creation of a new deployment with specific model and configuration details, and I verified that my account has Owner role on the subscription. I have not attempted to retry the deployment since the failure was identified. I also checked the account permissions and interface used, but have not performed any further troubleshooting or diagnostic steps.

Current status

I am requesting a review of my account to understand and lift the protection block causing the deployment failure. I would appreciate guidance on the next steps to resolve this issue.