To implement the automatic redirection with custom URI scheme, follow these steps: Add an empty Rich Text widget. Add the below code using custom HTML and you can hide the rich text widget.

<script> 
$(document).ready(function(){
 	window.location.href = "outlook:";
 }); 
</script>

Configure the redirection to the rich text after form submission

This setup will:

1. Process the form submission
2. Redirect to the specified Userview page
3. Automatically trigger the uri scheme application and also you can pass submitted form fields in the url and use them in the uri scheme. 
   
   

I tried it. It works! But the problem is that I don't want to redirect. I want to stay in the form as is the default behavior. I thought AJAX call but AJAX supports only calls to http and https not to custom URI schemes. Another workaround that is accepted by our customer is to close the tab after the call to custom uri scheme. After the form is submitted and the desktop application is opened by calling the custom URI schema, the task is considered as "completed" and the web page has no reason to exist.