An error occurred during an attempt to read the federation metadata

I have tried my level best and now I am quite hopeless with impl guides as I did not anything worthy which can help me to sort out the issue.

Internal domain name – company.local

External name – company.com

Claimbased works fine for crm.company.local

Can you people please suggest me whether I need ADFS proxy to get access my CRM externally or not? May I need to use auth.company.com or something else in this case?

I am done with the installation of ADFS proxy and it was trust established. However, the time I try add third party it resulted me with a “403 Error”. Please make confirm me about auth.company.com should have the IP of ADFS Proxy or not?

Error – ADFS 2.0 Management

An error occurred during an attempt to read the federation metadata. Verify that the specified URL or host name is a valid federation metadata endpoint.

Verify your proxy server setting. For more information about how to verify your proxy server setting, see the AD FS 2.0

Troubleshooting Guide https://www.msn.com/nl-nl/?ocid=NEFLS000).

Error message: The remote server returned an error: (403) Forbidden.

OK