Azure CDN SLA Credits & Refunds

CDN downtime that's billed against your Azure subscription is usually creditable, but the SLA fine print determines how much. This guide walks through the CDN availability commitment Microsoft publishes, the exclusions that quietly disqualify many claims, and what FinOps teams do to systematically recover credits across an Azure tenant.

What this guide covers

• The official Azure CDN uptime commitment and credit tiers
• Which incidents qualify (and which exclusions silently disqualify claims)
• How to file a CDN credit request inside the Azure claim window
• Why manual claim recovery typically leaves money on the table

Frequently asked questions about Azure CDN SLAs

What is the typical SLA uptime guarantee for Azure CDN?

Azure guarantees 99.9% availability for CDN responses to valid HTTP/HTTPS requests across both Standard and Premium tiers. Azure Front Door (the successor product for many CDN scenarios) carries the same 99.99% guarantee on its Premium tier. If Azure fails to meet this commitment during a billing cycle, you are eligible to receive a portion of your CDN spend back as a service credit.

How do I claim Azure CDN SLA credits after an outage?

Submit a billing support request through the Azure portal: Help + Support → New support request → Issue type: Billing → Problem type: Service credit request. Within two months of the billing period in question, provide the affected Subscription ID and Resource ID, the start and end timestamps of the impacted period, your evidence (Azure Monitor logs, Resource Health alerts, or independent monitoring), and your calculated Monthly Uptime Percentage for CDN. Microsoft validates against its internal incident records before issuing the credit to your billing account.

What exclusions apply to the Azure CDN SLA?

Notably, slow or unreachable origin servers, DNS misconfiguration, and cache-miss latency are all excluded — the SLA covers edge node delivery, not the responsiveness of your backend.

Why is it difficult to get refunds for CDN outages manually?

Networking incidents are the easiest to misclassify. A CDN disruption might really be a DNS resolution issue, an upstream peering problem, or a TLS certificate failure — and the SLA only covers what the provider's own infrastructure caused. Distinguishing a true CDN outage from a downstream symptom requires correlated telemetry across multiple layers, which is exactly the data manual claim filers tend to miss.

Related Azure SLA guides

Other Azure services creditable through the same portal-based billing request process:

• Azure Virtual Network SLA credits — Networking
• Azure Service Bus SLA credits — Networking
• Azure Virtual Machines SLA credits — Compute
• Azure Blob Storage SLA credits — Storage

Recover Azure credits without a portal grind

Azure billing support requests for CDN aren't difficult to file — they're tedious. Each one takes the same kind of subscription-ID, resource-ID, timestamp, and uptime-calculation packaging, repeated for every incident across every subscription you own.

Next Signal detects CDN SLA breaches across your Azure tenants, packages the credit request in the format Microsoft expects, and submits it. See how it works or start a free trial.