There were earlier posts where we discussed External Content Types setup for SharePoint 2010: Setting up External Content Type for SQL Server database using SQL Server authentication - SharePoint 2010 Foundation External Content Types - Reload - Setting up for SQL Server database using SQL Server authentication - SharePoint 2010 Server This one is about creating connection to the custom SQL Server database (External System) in SharePoint 2013. 1. Create Secure Store Service Target Application 1.1. Go to Central Administration -> Manage Service Applications -> Secure Store Service Application. Click "Generate New Key" if required: 1.2. Provide Pass Phrase: 1.3. Create "New" to create new Target Application: 1.4. Provide the name and other parameters and click "Next": Note : It's good idea to specify "Group" for Target Application Type. In that case you would be able to manage access to the external
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