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Exchange 2010 SSL offloading and binding to services on CAS

Posted on 2013-11-14
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Last Modified: 2016-10-25
Good Morning,

We are planning on utilizing SSL offloading so we can leverage our netscaler loadbalancers for  SSL termination.  A question I have is once I receive my 3rd party certificate and install it on the 2010 CAS servers is it necessary to bind it to any services?  My gut feeling says no as I will need to make changes to the IIS virtual directories and turn off SSL.  However, since Exchange installs a self signed cert which binds itself will outlook clients receive security warning notifications about the self signed cert?  I do know that until the 3rd party cert is installed users will receive these warnings however in order for those warnings to go away does the cert need to be bound as well?  Any information would be appreciated!

Thanks!
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Question by:mkllpit
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Expert Comment

by:David Carr
ID: 39648412
The Exchange Self signed certificate is bound to IMAP, POP,IIS, SMTP services. You can see this by typing Get-ExchangeCertificate | fl at the Exchange Management Shell prompt

To avoid clients getting prompts because of the untrusted self-signed certificates, you can disable the transport service immediately after installing Exchange.


I would recommend looking at http://social.technet.microsoft.com/wiki/contents/articles/1267.how-to-configure-ssl-offloading-in-exchange-2010.aspx
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Author Comment

by:mkllpit
ID: 39648434
Thanks.  I have looked at that document already.  My CAS servers are actually CAS/HT servers so I dont think disabling the Transport service will ultimately help.
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Expert Comment

by:David Carr
ID: 39648461
I have disabled the transport service on our CAS/HT servers during the transition from self signed to 3rd party certificate and it stopped the outlook clients from connecting and getting prompts.
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Author Comment

by:mkllpit
ID: 39648483
Ok, so do I still have to bind the 3rd party cert or simply installing it will prevent the prompts?  doesnt make much sense to bind them considering they wont be used on the CAS?
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David Carr earned 500 total points
ID: 39648519
We have bound IIS and SMTP to the 3rd party certificates so that the self signed certificate did not use that and we would not be impacted when those expired. I would still suggest binding the 3rd party cert to IIS and SMTP.
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Author Comment

by:mkllpit
ID: 39648525
Ok... I guess it can't hurt.  Thanks so much for your assistance!
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Expert Comment

by:David Carr
ID: 39648567
Glad to be able to help
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