421-TLS certificate verification failed due to hostname mismatch

Symptom

421-TLS certificate verification failed due to hostname mismatch.

Cause

The TLS certificate verification failed because it did not match the hostname specified in the given URL, and the "hostname" TLS verification feature is enabled.

Action
Verify that the specified target URL matches either the Common Name or Subject Alternative Name field of the TLS server certificate:
  1. Open Internet Explorer.
  2. Go to the URL that caused the failure.
  3. In the URL box, at the right, click the lock icon.
  4. Click View certificates, click the Details tab, and then click Subject Alternative Name.
  5. Verify that the target URL matches the name in the Subject Alternative Name box.