Azure Cosmos DB Blog
The latest news, updates and technical insights from the Azure Cosmos DB team
Latest posts
New RBAC Features for vCore-based Azure Cosmos DB for MongoDB
We’re excited to announce a major security enhancement for the vCore-based Azure Cosmos DB for MongoDB: Role-Based Access Control (RBAC) Integration for Secondary Users with Read/Read Write Privileges. Now available in public preview, this feature enables organizations to control data access with greater precision while preserving the flexibility and high performance that Azure Cosmos DB delivers. What’s New? With this release, administrators using vCore-based Azure Cosmos DB for MongoDB can assign specific access roles to secondary users, granting them the required Read or Read Write privileges to access clust...
Data API Public Preview in vCore-based Azure Cosmos DB for MongoDB
Editor's note (November 2025): Azure Cosmos DB for MongoDB (vCore) has been renamed to Azure DocumentDB. This article was originally published before the rename, so it uses the product name that was current at the time. While the product name has changed, the technical concepts discussed in this article remain applicable unless otherwise noted. For the latest Azure DocumentDB announcements, features, and technical guidance, visit the Azure DocumentDB Dev Blog. We're excited to announce that the Data API for vCore-based Azure Cosmos DB for MongoDB is now in public preview. This Data API offers a flexible and po...
Introducing Network Security Perimeter for Azure Cosmos DB: A New Way to Enhance Application Security
Security is essential for any application, and we are pleased to announce the public preview of Azure Network Security Perimeter, a feature that lets Azure Cosmos DB customers enhance their application security by creating a logical network boundary that isolates your applications network from external networks, such as the internet. Network security perimeter provides an extra layer of security to block unauthorized access to your data. Why use network security perimeter? Azure Network Security Perimeter provides a secure perimeter for your PaaS services like Azure Cosmos DB that are deployed outside of your v...
Achieving Production Readiness with Cross-Region Replication in Azure Cosmos DB for MongoDB (vCore)
In today's digital landscape, cross-region replication has become a foundational feature for any managed database service aiming to provide high availability, disaster recovery, and global scalability. Ensuring data continuity and availability even during regional outages or unexpected events is essential, and Azure Cosmos DB for MongoDB (vCore) now offers a robust generally available (GA) cross-region replication feature designed to meet these needs. This feature empowers organizations to maintain a complete replica of their data in another Azure region, enabling seamless disaster recovery (DR) and scalable, glo...
How Toyota uses Azure Cosmos DB to power their multi-agent AI system for enhanced productivity
This article was co-authored by Kenji Onishi, Senior Manager, Powertrain Performance Development, Toyota Motor Corporation; Kosuke Miyasaka, Azure App Innovation Specialist; and Keisuke Hatasaki, Azure Sr. Specialist, GBB. Executive Summary: Toyota Motor Corporation, one of the world’s largest automobile manufacturers, has adopted Azure Cosmos DB in its new multi-agent AI system designed to improve development processes. This move is aimed at enhancing efficiency and reducing the time required for developing new vehicle models in a highly competitive automotive industry. Introduction Toyota Motor Corporat...
New Vector Search, Full Text Search, and Hybrid Search Features in Azure Cosmos DB for NoSQL
We’re excited to announce several new features and advancements for search and retrieval functionalities in Azure Cosmos DB for NoSQL including: These features open the door to building new search and AI scenarios on Azure Cosmos DB, particularly benefiting Retrieval-Augmented Generation (RAG) and multi-agent AI applications by enhancing the relevance and accuracy of generated content. Together, they empower developers to build sophisticated AI applications that provide users with more relevant and timely information. Note: The public previews of Full Text Search and Ranking and Hybrid Sea...
Public Preview: Vector Search in Azure Cosmos DB for MongoDB with DiskANN
We’re excited to announce the preview of DiskANN vector indexing for vCore-based Azure Cosmos DB for MongoDB! This feature empowers you to perform efficient, low-latency searches on large vector datasets, making it perfect for scaling applications that depend on fast similarity searches—like recommendation engines, document retrieval, and AI insights. With DiskANN, you can “do more with less” by allowing you to handle larger vector datasets and achieve superior search performance even on smaller SKUs. What Is DiskANN? Microsoft Research developed DiskANN, which already powers high-speed, large-scale vector se...
Change Streams in public preview for vCore-based Azure Cosmos DB for MongoDB
Change streams provide a real-time flow of database changes from your database to your application. This feature enables the development of reactive applications by allowing you to subscribe to database changes. Configuring Change Streams To get started with change streams, let's look at an example code snippet that initiates a change stream on the collection. This script continuously monitors for any changes and prints the change event in JSON format. Personalise stream with pipeline stages You can customize your change stream output by specifying an array of one or more pipeline stages during confi...
Announcing Public Preview: VS Code Extension for Azure Cosmos DB
We’re excited to announce the public preview of the latest update to the Azure Databases Visual Studio Code extension, which brings the full power of Azure Cosmos DB to your favorite editor! This extension integrates a robust GUI right into Visual Studio Code, allowing you to connect, query, and manage your Azure Cosmos DB resources seamlessly. This new addition speeds up your workflow, enhances security, and boosts efficiency. What Does the Extension Offer? With this extension, handling your Azure Cosmos DB workloads is simpler and faster. Here’s what’s now at your fingertips: ...