Azure Key Vault offers a secure solution for storing sensitive information such as database credentials, allowing only specified Azure services to access it. This blog post guides users through storing Couchbase Server credentials in Azure Key Vault and accessing them via an Azure Function. The process involves setting up Couchbase Server, creating an Azure Key Vault, storing secrets, and modifying Azure Functions to retrieve these secrets securely. Azure Key Vault provides advantages over app settings by encrypting stored values, offering version history, and enabling secret sharing across applications. Users must enable a managed service identity for the Azure Functions service and set an access policy for the Vault to authorize access. The post emphasizes the enhanced security and centralized management of credentials using Azure Key Vault, encouraging the Couchbase community to share their experiences and seek advice on integrating Couchbase with Azure.