The 'Access-Control-Allow-Origin' header Contains Multiple Values '*, *', but only one is allowed. Origin 'http://sharepoint' is therefore not Allowed Access.

The 'Access-Control-Allow-Origin' header Contains Multiple Values ', ', but only one is allowed. Origin 'http://sharepoint' is therefore not Allowed Access.

Krishna Murthy

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This code snippet for The 'Access-Control-Allow-Origin' header Contains Multiple Values '*, *', but only one is allowed. Origin 'http://sharepoint' is therefore not Allowed Access.

XMLHttpRequest cannot load http://MVCApi. The 'Access-Control-Allow-Origin' header contains multiple values '*, *', but only one is allowed. Origin 'http://sharepoint' is therefore not allowed access.

When such error arise, make sure to comment the below web.config entry under <system.webServer>.

<httpProtocol>
   <customHeaders>
      <add name="Access-Control-Allow-Origin" value="*"/>
   </customHeaders>
</httpProtocol>