For connecting your on-premise Spring Boot application to Azure SQL Database using Microsoft Entra ID authentication, there are several methods besides the access token method that you've already implemented. Here are some alternatives:
- Federated Authentication with ADFS https://learn.microsoft.com/en-us/azure/azure-sql/database/authentication-aad-overview?view=azuresql
- Certificate-Based Authentication https://techcommunity.microsoft.com/t5/azure-database-support-blog/certificate-based-authentication-for-azure-sql-database/ba-p/3109938
- Active Directory Device Code Flow Authentication The
SqlConnection
string for this would look something like **"Server=yourserver.database.windows.net; Authentication=Active Directory Device Code Flow; Encrypt=True; Database=yourdb; Connect Timeout=180;"
** https://learn.microsoft.com/en-us/sql/connect/ado-net/sql/azure-active-directory-authentication?view=sql-server-ver16 - Default Authentication https://learn.microsoft.com/en-us/sql/connect/ado-net/sql/azure-active-directory-authentication?view=sql-server-ver16
Each method has its own set of pros and cons, and the best choice depends on your specific requirements, such as the level of security needed, ease of implementation, and the infrastructure already in place. If you need further assistance or specific guidance on any of these methods, feel free to ask.
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