The remote server returned an error (404) Not Found

Cause

Communications cannot be established with the authentication service. The following figure provides an example of the error message.

Figure 1. The remote server returned an error (404) Not Found

This issue appears when the NES Administrator Console cannot contact the Authentication Service because the Authentication Service URL is not correct, or the TLS certificate has expired.

Resolution

Perform the following actions to correct the URL in the NES configuration:

1. Log in to the NES host.
2. Edit the C:\inetpub\nes\web.config file.
3. Search for the string <setting name=”AuthenticationService”
4. Correct the URL in the associated <value> tag for the setting.
5. Save the web.config file.
6. Refresh the System Diagnostics page in the NES Administrator Console and confirm that the Authentication Service status is pass for applicable NES tests.