Dynamics CRM Metadata URL is disabled

Hi

I am trying to integrate Dynamics CRM 2016 with Sharepoint 2013 onpremises server to server side integration. When I run the below command

$i = New-SPTrustedSecurityTokenIssuer –Name "crm" –IsTrustBroker:$false –MetadataEndpoint  "192.168.3.39/.../json"

The remote server error 400 return bad request error occured.

So I copy the url of metadata and placed in the browser and it displays
Metadata URL is not published.

Could you please tell me, to resolve the 400 error Do I need to enable metadata? If it How should i enable?