Blog Post
Announcing the Public Preview of the New App Service Quota Self-Service Experience
On Azure Free Trial subscriptions, Linux App Service (including F1/D1) appears to be blocked even though the Quotas blade shows no quota request is required. Deployments fail with a 401/quota-0 error, while Windows App Service works and upgrading to Pay-As-You-Go immediately resolves the issue. This seems to be a subscription entitlement limitation rather than a quota issue and could benefit from clearer documentation/error messaging.
Update based on further testing on Azure Free Trial:
After additional validation, App Service creation fails on Azure Free Trial subscriptions across all SKUs (Free, Shared, Standard, Premium) and for both Windows and Linux, returning a 401 Unauthorized / quota 0 error (e.g., Current Limit: 0 for Free/Shared/Standard VMs).
This indicates a subscription-level entitlement restriction, not a regional quota or OS limitation. The Quotas blade shows no actionable quota request, which can be misleading.
Azure SQL, Storage, and other services deploy successfully in the same subscription, further confirming this is App Service–specific. Clear documentation or explicit messaging indicating that App Service is disabled on Free Trial subscriptions would help customers evaluating Azure services and avoid significant troubleshooting time.