Copy the Url and save it in notepad  for reference.

Login in to MSCRM and navigate to Advanced settings in advanced settings navigate to settings ->customizations->Solutions.

In solutions select solution that you want to customize

In the solution navigate to webresource.

Create a web resource using below code.

function Response(formContext) {
var value = formContext.getAttribute(“schema name of the feild”).getValue();
var value2 = formContext.getAttribute(“schema name of the feild”).getValue();
var params = {
“Value”: value,
“Value2”: value2,
}
var url =”Pass http url that u have copied from the powerautomate trigger”
var req = new XMLHttpRequest();
req.open(“POST”, url, true);
req.setRequestHeader(‘Content-Type’, ‘application/json’);
req.send(JSON.stringify(params));
req.onreadystatechange = function () {
if (this.readyState === 4) {
req.onreadystatechange == null;
if (this.status == 200)
{
var result = this.response;
alert(“” + result)
}
else if(this.status == 400)
{
alert(this.statusText);
var result = this.response;
alert(“Error” + result);
};
}
}
}