Edit soution properties to set multiple startup projects (select API, WebApp, AngularApp and IdentityServer as start projects). Then just run F5, this will start the Identity Server on https://localhost:44367/, API on https://localhost:44374/, Angular App on https://localhost:44398/ and Web App on https://localhost:44340/. First run will initialize the database IdentityServerSample with all the tables and some sample data and Identity Server configuration data. Go to Web App -> SignIn, this will redirect to Identity Server. Register if it's first time, accept consent and once logged in can access API resources.