A hostname mismatch occurs when the requested hostname is not included in the certificate presented by the server.
Examples include visiting www.example.com when only example.com is covered, or DNS pointing a hostname to a server that presents a certificate for a different site.
- Confirm the exact hostname entered in the browser or application.
- View the certificate and check its covered names.
- Verify DNS points to the intended service.
- Provision or install a certificate that includes the hostname when needed.
