For the installable cloud application to run successfully, you need to tell the client app where the Web APIs is hosted and run.
In the Deploy > Basic tab, you can specify the Web API site URL for the application.
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To deploy to the local Kestrel server, the site URL is automatically generated using the host and port; and this site URL is directly used as the Web API site URL, and it is also used to formulate the application URL automatically.
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To deploy to IIS, you can click the Configuration button to specify the site URL or leave it empty. This site URL is directly used as the Web API site URL, and it is also used to formulate the application URL (the client app is deployed with the Web APIs by default).
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To package the application to a folder, you can specify the Web API site URL or leave it empty.
If you have not specified the site URL, the Web API URL is set to http://localhost by default, and you can change this value in the client app after the application is deployed or packaged.
The Web API URL indicates the root URL of the PowerServer Web APIs, for example, https://172.16.10.10:5099. It is highly recommended that you specify an HTTPS URL for the production environment.
Using "localhost" is only appropriate for the development environment when the installable cloud app is deployed to the local machine. The best practice would be to specify the IP address or domain name no matter in the development environment or production environment.
Note
Exception: if you use a self-signed certificate in the development environment, the self-signed certificate will only work with "localhost" but NOT the IP address or domain name. For more, refer to Support HTTPS.
