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Exchange 2010 UC SAN Certificate Questions.

Hey Folks,

I have stood up a new Exchange 2010 SP3 Server (VM) into an existing 2010 Standard Site.  I need to go through the New Exchange Certificate Wizard and have a few questions.

On the wizard step below I am seeing the old server MSX (currently in production) listed with new server. Should I leave the old server "MSX" in the field below?  Does it cause any issues to remove it and leave just the new server "MSX-V"?  Not cutting over for a month or so.

Client Access server (Outlook Web App)
    Domain name you use to access Outlook Web App internally.
       msx.ourdomain.com,msx-v.ourdomain.com


Under the wizard step below the wizard double entered the domain name?  Should txt in bold be removed?

Client Access Server (Web Services, Outlook Anywhere, and Autodiscover)
Outlook Anywhere is enabled
      External host name for your organization (example: mail.contoso.com)
            mail.ourdomain.com,ourdomain.com

Under the wizard step below it is populating the field with ourdomain.com shouldn't this be mail.ourdomain.com?

Hub Transport server
      Use mutual TLS to help secure Internet mail.
            ourdomain.com

I am looking at Digicert, Geotrust and Thawte for the UC SAN Certificate.  Anyone have any issues with any of the three and is there any consensus on which one is best?  

Thanks,
Rich
0
rjearley1966
Asked:
rjearley1966
1 Solution
 
Simon Butler (Sembee)ConsultantCommented:
Certificate vendor - personally I use a GoDaddy reseller, as they have widespread device coverage and are cheap.

The certificate wizard takes its information from the configuration of Exchange. With the recently changes to the certificate rules, the best practise is to no longer use the internal server name anywhere, but to change to using the public name both internally and externally.
http://semb.ee/hostnames2010

The certificate wizard also makes the common name the root of the domain. I have never understood why and will always remove it. Make the common name the name the users will use most - mail.example.com.
In most cases you can get away with just two names on the certificate:
- mail.example.com
- Autodiscover.example.com

Any others are optional.

Simon.
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rjearley1966Author Commented:
Thanks a bunch Sembee,
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