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SSL - Subject Alternative Names

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SSL - Subject Alternative Names - 31.May2007 10:42:26 AM   
derek.sparks

 

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I see in Henriks book that he mentions that in order to support Outlook Anywhere, OWA, Exhange ActiveSync and Web AutoDiscover, the site needs an SSL cert with subject alternative names.  He mentions Entrust.com, Geotrust.com and Verisign, but those certs are $600 a year at least.  However, GoDaddy has what they call a WildCard certificate that secures your site and any subdomains as well.  Does anyone know if this type of certificate will work to secure all of the Exchange 2007 sites?  I hope so....$199 for one year sure beats $600.
https://www.godaddy.com/gdshop/ssl/ssl.asp?ci=9173

Cheers!

Post #: 1
RE: SSL - Subject Alternative Names - 31.May2007 3:31:15 PM   
Henrik Walther

 

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Hi Derek,

A wildcard certificate is very different from a SAN certificate. For example you cannot use the internal hostname of the E2K7 server with a wildcard certificate (if internal and external names are different, which they typically are).

But the good thing is we now have one more SAN certificate provider, which offers SAN certificate with 3 domains included for 200$:
http://www.comodo.com/msexchange/

If you require additional domains, you'll then need to pay 30$ per domain.

I also think GoDaddy will start issuing these types of certificates pretty soon, since anything else would be plain stupid.


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(in reply to derek.sparks)
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RE: SSL - Subject Alternative Names - 31.May2007 4:58:46 PM   
derek.sparks

 

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Exactly what I was looking for.  Thanks! 

Do OWA and EAS require separate SSL certs?  I don't plan on using Outlook anywhere...just OWA and enabling my WM5 users to recieve email.

Thanks again,

Derek

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Post #: 3
RE: SSL - Subject Alternative Names - 1.Jun.2007 2:36:35 AM   
Henrik Walther

 

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Nope OWA and EAS typically use the same FQDN.


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RE: SSL - Subject Alternative Names - 1.Jun.2007 5:34:57 PM   
derek.sparks

 

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I looked at Comodo's website...and it looks to be a pretty good value.  However, the process they outline to generate a new CSR looks a little difficult.


New-ExchangeCertificate -GenerateRequest -SubjectName "C=GB, O=Comodo, CN=exchange.comodo.com" -IncludeAcceptedDomains -Path c:\exchange.comodo.com.req

My question is, in which flag would you put in the additional names? For example, my exchange server is named 'email.mydomain.com' and I want to install the certificate for:
email.mydomain.com
owa.mydomain.com
autodiscover.mydomain.com

oh, and don't try calling Comodo for help.  I did a bit earlier and I got a run-around by some guy named Sharice who ended up telling me that IIS and Exchange were the same thing and that I should "...do a search for 'Exchange Management Shell' and then generate the request."  Huh?  What?  So, again, I come to the forums looking for expert help.

Many thanks,



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Post #: 5
RE: SSL - Subject Alternative Names - 1.Jun.2007 5:58:21 PM   
derek.sparks

 

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Also, looks like Digicert is offering them as well.
http://www.digicert.com/unified-communications-ssl-tls.htm


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Post #: 6
RE: SSL - Subject Alternative Names - 1.Jun.2007 6:40:48 PM   
derek.sparks

 

Posts: 9
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OK...I finally figured it out in case anyone else is looking for this:

New-ExchangeCertificate -GenerateRequest -Path c:\email.mydomain.com.req -SubjectName "c=US, l=Kirkland, s=WA, o=Name of Organization, cn=email.mydomain.com" -DomainName owa.mydomain.com, autodiscover.mydomain.com -PrivateKeyExportable $true

Notice that the first domain name is listed inside the "-SubjectName" after "cn=" and additional domain names are later added after the -DomainName parameter with commas between the additional domain names. You can add as many additional domain names as necessary. 

Hope this helps.

Cheers!

(in reply to derek.sparks)
Post #: 7
RE: SSL - Subject Alternative Names - 3.Jun.2007 5:11:56 AM   
Henrik Walther

 

Posts: 6928
Joined: 21.Nov.2002
From: Copenhagen, Denmark
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Yes and below MS KB article will be updated as more and more CA providers begins to offer SAN certificates:
http://support.microsoft.com/default.aspx?scid=kb;EN-US;929395


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Henrik Walther
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MSExchange.org

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(in reply to derek.sparks)
Post #: 8

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