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Exchange 2016: TLS test Hostname Mismatch


My scenario: Exchange 2016 published over internet with 3rd party CA certificate (Go Daddy) 

The Go Daddy certificate has been installed and associated to service IIS, POP, IMAP, SMTP. 

OWA, ECP works well and without certificate error. 

The problem is just with TLS. Test from https://ssl-tools.net fail with Hostname Mismatch.

The certificate used is that generated by itself, self signed with the netbios name.

IS there a way to resolve this issue and make tls works with the correct certificate?

Thank you