Final answer:
User data should be stored in Azure data services like Azure Blob Storage, Azure SQL Database, or Azure Table Storage depending on the type and access requirements, not in Azure Key Vault.
Step-by-step explanation:
User data should not be stored in Azure Key Vault because it is primarily designed for managing secrets, keys, and certificates rather than storing user data. Instead, user data should be stored in services that are specifically designed for data storage such as Azure Blob Storage for large amounts of unstructured data, Azure SQL Database for relational data, or Azure Table Storage for semi-structured NoSQL data.
It is important to choose the appropriate Azure storage solution that aligns with the types of data to be stored and the access patterns required by the application. It's also vital to ensure that the data is stored securely, following best practices for encryption, access control, and monitoring.