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Cert issue after installing a new firewall

Last Modified: 2012-06-21
We recently changed firewalls to a Sonicwall 2400. When smartphone users try to connect to our mail server they get an error. TestExchangeConnectivity.com shows the following error:

  Additional Details
  Host name mail.ourdomain.com doesn't match any name found on the server certificate CN=, OU=HTTPS Management Certificate for SonicWALL (self-signed), O=HTTPS Management Certificate for SonicWALL (self-signed), L=Sunnyvale, S=California, C=US.

I don't think we had any sort of certificate on the old firewall, but can't be certain. Our mail server has the right certs.

Is there a way to get the Sonicwall out of the cert business entirely? If not, what are my options. I tried importing the certs on the mail server to the firewall, but it didn't solve the problem (though I could have done it incorrectly....)

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