“Troubleshooting a Remote Certificate Invalid Error When Calling an External Endpoint from Web App”

Understanding the Problem: Remote Certificate is Invalid When Calling an External Endpoint from Web App
What is a Remote Certificate?
A remote certificate is an authentication mechanism used by web applications to verify the identity of the remote server it is connecting to. In order for a connection to be established, the remote server must present a valid certificate to the web application. If the certificate is not valid, the connection will fail and the web application will display an error message.

What Causes the Error?
There are a few common causes of the remote certificate being invalid when calling an external endpoint from a web application. These include:

* The remote server is using an outdated or self-signed certificate
* The remote server is using a certificate that is not trusted by the web application
* The remote server is using a certificate that has expired or been revoked

How to Resolve the Error?
To resolve this error, there are a few steps that can be taken. These include:

* Update the remote server to use a valid, trusted certificate
* Configure the web application to trust the remote server’s certificate
* Resolve any issues with the remote server’s certificate

Conclusion
When calling an external endpoint from a web application, it is important to ensure that the remote server is using a valid, trusted certificate. If the certificate is not valid, the connection will fail and the web application will display an error message. To resolve this error, the remote server must be updated to use a valid, trusted certificate, and the web application must be configured to trust the remote server’s certificate.
References:
Remote certificate is invalid when calling an external endpoint from web app
1. Remote Certificate Invalid
2. Remote Certificate Error
3. Web App Certificate Error