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Exchange 2010 Certificates with non-split DNS

I have Exchange 2010 setup and running alongside our Exchange 2003 environment.  Our external domain name I will call exdomain.com and our internal domain indomain.com.

I have our public cert moved onto our Exchange 2010 server, mail.exdomain.com, and it works just fine.  Now Outlook complains that the cert doesn't match what it is looking for.  I understand this is because Outlook is looking for the NETBIOS name and the cert with the NETBIOS name that the install created.  From what I've read there are two ways around this.

1.  Add our NETBIOS name to our public cert
2.  Change the NETBIOS names for autodiscover, webservices and OAB via EMS to the full public name, mail.exdomain.com.

I guess either of these would work.  But I was wondering if I should do one vs the other.  We have a very basic setup with all roles on one server and no ISA server in the mix.
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1 Solution
Rick FeeMessaging Engineer - Disaster Recovery EngineerCommented:
You can mod the vdir to correct this....just follow this article.


jpletcher1Author Commented:
This was the article I actually had read before I posted this.  So I could follow this article or get the NETBIOS name on our cert and either should work.  Was just wondering if one way was better than the other or if either way limited us in any way.
jpletcher1Author Commented:
I just went ahead with the article instead of going with adding names to our current certificate since that was easier and we connect to OWA internally with the same name as we do externally.  I guess if I ever need to do it the other way I can always go back and change it.

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