Metadata contains a reference that cannot be resolved: 'https://************.*******/XRMServices/2011/Organization.svc?wsdl'.
Inner Exception Messages
The remote server returned an error: (407) Proxy Authentication Required.
How and When Problem Occurs
This is generic WCF Service issue, usually occur when a custom application is unable to resolve service references.
The above error is very generic and it could be due to multiple reason, therefore it is advisable to look more into Inner exception details or detail exception data.
Here, we are going to discuss special case about “The remote server returned an error: (407) Proxy Authentication Required.” And this resulted in unable to resolve service reference.
Note : When you are connected on LAN or working in your organization, there may be a possibility that an organization has set default proxy to avoid access to such services.
Try turning off the proxy and check if your application or custom code is able to resolve metadata reference.
If “Yes”, then definitely it’s a proxy issue, and we can edit the config file to provide required authentication.
Add the below tag to avoid proxy issue.
Let me know if this does not resolve issue.