To use Microsoft SQL integration in n8n, start by adding the Microsoft SQL node to your workflow. You'll need to authenticate your Microsoft SQL account using supported authentication methods. Once connected, you can choose from the list of supported actions or make custom API calls via the HTTP Request node, for example: make sure to configure the connection details such as the server, database name, and your credentials. After the setup, you can execute queries, retrieve data, and integrate it with other nodes in your n8n workflow. Test the configuration to ensure everything works seamlessly before proceeding with your automations.