# Azure product updates - 2026-09-10 **2 new update(s)** — first seen in this run. The last 7 day(s) are rescanned every time so late or backdated announcements are not missed. Grouped by Azure product category. Source: [Azure Updates](https://azure.microsoft.com/en-us/updates) ## Summary by category | Category | Updates | GA | Preview | Top products | | --- | ---: | ---: | ---: | --- | | [Compute](#compute) | 1 | 1 | - | Virtual Machines | | [Storage](#storage) | 1 | 1 | - | Azure Blob Storage | ## Compute ### [Generally Available: Azure Ephemeral OS Disk with full caching for VM/VMSS](https://azure.microsoft.com/en-us/updates?id=570551) **Status:** Launched | **Published:** 2026-09-09 | **Products:** Virtual Machines | **Tags:** Features Azure Ephemeral OS Disk with full caching is now generally available, providing significantly faster OS disk access and improved resilience for I/O-sensitive workloads by caching the entire OS image on local VM storage. - Caches complete OS image on local storage to eliminate remote-storage reads after caching. - Delivers up to 10× better I/O performance and low-millisecond OS disk access. - Available for new VMs and VM Scale Sets with 8-core-and-larger GPU, storage-optimized, memory-optimized, HPC, general-purpose, and compute-optimized series across Azure public regions. - Enables improved resilience during storage interruptions without slowing VM provisioning, configurable via Azure CLI, ARM templates, or REST APIs. ## Storage ### [Generally Available: User-bound user delegation SAS for Azure Storage](https://azure.microsoft.com/en-us/updates?id=569241) **Status:** Launched | **Published:** 2026-09-09 | **Products:** Azure Blob Storage | **Tags:** Security, Feature Azure Storage now generally supports user-bound user delegation SAS tokens, enhancing security by restricting SAS token usage to a specific end user identity. - User-bound user delegation SAS extends existing user delegation SAS by binding the SAS token to an end user's Entra ID, ensuring only the intended user can use the token. - This feature is generally available in all public Azure regions with no additional cost beyond standard storage transaction fees. - Supports cross-tenant scenarios with configuration, allowing SAS tokens to be used by users in different tenants when enabled. - Improves security best practices by leveraging Microsoft Entra credentials and RBAC, reducing the need to store account keys in application code. Documentation: [Create a user delegation SAS - Azure Storage](https://learn.microsoft.com/en-us/rest/api/storageservices/create-user-delegation-sas) --- _Generated automatically on 2026-09-10 00:55 UTC._