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Exchange and Outlook SSL certificate warning

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  • Exchange and Outlook SSL certificate warning

    We are running Exchange 2007 on a server, and external Outlook clients are getting the certificate
    warning "The name on the security certificate is invalid or does not match the name of the site" every
    time they connect. The name on the valid SSL certificate is, and, of course,
    Outlook is going to, so the reason for the error is obvious. But I believe
    there is a way to configure the server so that the single name certificate can be used for both the named
    domain and autodisover, thus saving the high expense of a SAN certificate with multiple names. Is this
    correct? If so, could someone please help with a concise explanation of how this is accomplished,
    whether through autodiscover settings, DNS, or some other way?
    Thank you!

  • #2
    Re: Exchange and Outlook SSL certificate warning

    High expense? Less than $70/year for a UC certificate with both names on it.
    If your DNS provider supports SRV records then you can use them to do Autodiscover.

    However you must ensure that does NOT resolve, so remove any wildcard DNS entry you might have in your public DNS.

    Simon Butler
    Exchange MVP

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