Installing and Configuring SQL Server Manually (Optional)
You can optionally install and configure SQL Server as a standalone operation without using the Sentinel LDK installation wizard. This is typically required:
>When you install the Sentinel LDK-EMS database on a different machine from Sentinel LDK-EMS Service.
>When you want to use a version of Microsoft SQL Server other than the default version. (By default, the Sentinel LDK installation wizard installs SQL Server 2019 Express.)
Download and install Microsoft SQL Server from: https://www.microsoft.com/en-in/download/details.aspx?id=42299