Use Event Domains to manage the flow of custom events to your various business orgs, customers, or applications. Event Domains take the underlying architecture Azure services like Storage and IoT Hub use to publish their events and makes it available for you to use. Partition your tenants with thousands of topics in one place and a managed auth model.

Use Event Domains to:

• Manage multitenant eventing architectures at scale.
• Manage your authorization and authentication.
• Partition your topics without managing each individually.
• Avoid individually publishing to each of your topic endpoints.