Azure AI Foundry: Deployment Blocked by Error 715-123420 — Account Review Needed

Problem description

I am trying to create model deployments in Azure AI Foundry in my AIServices resource (France Central). Every attempt since 7 November 2026 fails with error 715-123420: "Our system has detected this request as unusual activity for your account."

Environment

Azure AI Foundry, Azure AI Services resource of kind AIServices, France Central, Microsoft for Startups sponsorship subscription (Developer support plan). Model: gpt-5.4-mini (2026-03-17), DataZoneStandard, capacity 20.

What I've already tried

• Attempts on 7, 8, 11 and 12 November 2026, from both the Foundry portal (manual) and Azure CLI. All failed with the same error.
• On 12 November I waited 24 hours, as support advised, and made one single manual portal attempt with a new deployment name. It failed again with 715-123420.
• Checked: quota is available (DataZoneStandard limit 1000 in France Central), the model is listed as available for the resource, my account is subscription Owner and Global Administrator, and there are no Azure Policy assignments. Another AIServices resource in the same subscription has deployments created earlier.
• Support cases 2611110050004135 and 2611150050000540 concluded this is a service-side protection review with no self-service fix and redirected me here.

Current status

The block is still in place. Could a moderator please escalate this to the team that reviews the unusual-activity flag? I can share the subscription ID and request IDs privately.