No ‘Access-Control-Allow-Origin’ header is present on the requested resource

[Dipesh Chouksey]

Hi Experts,

I am calling rest api "https://something.com/EmpEmployment?xxxxx" form JIRA plugin using jquery. But i am getting Error"No 'Access-Control-Allow-Origin' header is present on the requested resource" in browser. If i disable security of browser then my api is working. Kindly help me how to resolve this JIRA.

$.ajax({
     type: "GET",
    async: false,
    url: https://something.com/odata/v2/EmpEmployment?xxxxx,
    beforeSend: function(xhr){
			        	xhr.setRequestHeader ("Authorization", "Basic " +  btoa(user_name+'@'+tenant_id+":" + passwords));
					},			
			        success: function (data) { 
 });

XMLHttpRequest cannot load https://something.com/EmpEmployment?$select=use…-05T23:59:59.999%27&$format=JSON&$orderby=personIdExternal&_=1491373787424. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://user:2990' is therefore not allowed access. The response had HTTP status code 401

[AnnWorley]

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