Olly,
Check this article also:
http://support.microsoft.com/default.aspx/kb/940726
It should help with checking and/or changing the URLs that your clients connect 
too.
Tim

From: Oliver Marshall [mailto:[EMAIL PROTECTED]
Sent: Tuesday, May 13, 2008 10:56 AM
To: MS-Exchange Admin Issues
Subject: RE: Exchange 2007 and SSL certs for internal and external use
Is there  a way to do it without a new Cert?

Just checked on the definition of split-dns and we already do that here to 
allow for internally hosted services, but that hasn't had any impact on the 
setup.

From: Tim Vander Kooi [mailto:[EMAIL PROTECTED]
Sent: 13 May 2008 16:54
To: MS-Exchange Admin Issues
Subject: RE: Exchange 2007 and SSL certs for internal and external use

A SAN cert will cover both your .com and .local.

From: Oliver Marshall [mailto:[EMAIL PROTECTED]
Sent: Tuesday, May 13, 2008 10:44 AM
To: MS-Exchange Admin Issues
Subject: RE: Exchange 2007 and SSL certs for internal and external use

We looked at a wildcard cert but that wont work as our internal domain is a 
.local and externally we are a .com.

The users connection settings are pre-filled by Outlook 2007. Is this editable 
in AD so that we are able to change the server FQDN they connect to?

From: Sam Cayze [mailto:[EMAIL PROTECTED]
Sent: 13 May 2008 16:19
To: MS-Exchange Admin Issues
Subject: RE: Exchange 2007 and SSL certs for internal and external use

Another way might be a 'wildcard certificate'.  One that handles *.domain.com, 
www.domain.com<http://www.domain.com>, domain.com, mail.domain.com, etc.  A 
little more spendy though...

________________________________
From: Don Ely [mailto:[EMAIL PROTECTED]
Sent: Tuesday, May 13, 2008 10:07 AM
To: MS-Exchange Admin Issues
Subject: Re: Exchange 2007 and SSL certs for internal and external use
Split DNS
On Tue, May 13, 2008 at 7:41 AM, Oliver Marshall <[EMAIL 
PROTECTED]<mailto:[EMAIL PROTECTED]>> wrote:

Hi chaps,



I have an Exchange 2007 server here on which we have setup an SSL certificate 
(in the name of mail.mydomain.com<http://mail.mydomain.com/>). This works great 
for users outside using Outlook 2007s Outlook Anywhere feature. However, 
internal users get a warning stating that the SSL cert name doesn't match the 
server. It's not the biggest issue, but it's...untidy.



What's the best way to handle this? Obviously I can only attach one SSL cert to 
the Default site in IIS on the Exchange box and the internal domain 
(mydomain.local) is sufficiently different from the external one 
(mydomain.com<http://mydomain.com/>) that we can't get an SSL cert to cover 
both.



Is there a way to create a new IIS site that still points at the same exchange 
folder structure as the current Default Site but that is set to accept a 
different hostname? That way I could have one site for the internal users 
hitting blue-server.mydomain.local and one for the external users hitting 
mail.mydomain.com<http://mail.mydomain.com/> and attach a correct cert to both.



Can this be done ?



Olly



















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