SLA summary for Azure services

Azure Active Directory Domain Services

We guarantee at least 99.9% of Azure Active Directory Domain Services requests for domain authentication of user accounts belonging to the Managed Domain, LDAP bind to the root DSE, or DNS lookup of records will complete successfully.

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Azure Firewall

Azure Firewall offers fully stateful native firewall capabilities for Virtual Network resources, with built-in high availability and the ability to scale automatically.

We guarantee that Azure Firewall will be available at least 99.95% of the time, when deployed within a single Availability Zone.

We guarantee that Azure Firewall will be available at least 99.99% of the time, when deployed within two or more Availability Zones in the same Azure region.

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Azure Backup

We guarantee at least 99.9% availability of the backup and restore functionality of the Azure Backup service.

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Cloud Services and Virtual Machines

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Azure DDoS Protection

We guarantee DDoS Protection Service will be available at least 99.99% of the time.

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Azure DNS

We guarantee that valid DNS requests will receive a response from at least one Azure DNS name server 100% of the time.

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Managed Disks

Managed Disks does not have a financially backed SLA itself. The availability of Managed Disks is based on the SLA of the underlying storage used and virtual machine to which it is attached. Please see the Virtual Machines and Storage SLA for more details.

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Storage Accounts

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