Generally Available: Azure Event Grid new capabilities

Multiple new Azure Event Grid features have reached General Availability, supporting real-time telemetry, automation, and hybrid workloads. Features now in General Availability: * [MQTT OAuth 2.0 Authentication](https://learn.microsoft.com/en-us/azure/event-grid/oauth-json-web-token-authentication) * Authenticate MQTT clients using JSON Web Tokens (JWTs) issued by any OpenID Connect (OIDC)-compliant identity provider, enabling seamless integration with Microsoft Entra ID (formerly Azure AD), custom identity platforms, or third-party IAM solutions. * [MQTT Custom Webhook Authentication](https://learn.microsoft.com/en-us/azure/event-grid/authenticate-with-namespaces-using-webhook-authentication) * Use external webhooks or Azure Functions to dynamically validate client connections. Authorize with shared access signatures (SAS), API keys, custom credentials, or X.509 certificate fingerprints to support scenarios requiring granular control across large, dynamic fleets of devices or multitenant environments. * [MQTT Assigned Client Identifiers](https://learn.microsoft.com/en-us/azure/event-grid/mqtt-support#assigned-client-identifiers-preview) * Assign deterministic, pre-approved client identifiers to MQTT clients to offer session continuity, better device tracking, simplified diagnostics, and improved auditability—critical for managing long-lived connections and operational visibility in regulated industries. * [First Class integration with Fabric](https://learn.microsoft.com/en-us/azure/event-grid/mqtt-events-fabric) * Route MQTT messages and Cloud Events from Event Grid Namespace to Fabric Event Streams for real-time analytics, storage, visualization of IoT data without using Event Hubs. [Learn more](https://techcommunity.microsoft.com/blog/MessagingonAzureBlog/what%E2%80%99s-new-in-azure-event-grid/4458299).