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SBS 2003 companyweb, OWA webmail and domain website - DNS problems

Posted on 2011-10-27
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Last Modified: 2012-05-12
I have a situation where I registered a website domain (i.e., abcd.com) which hosting by a website hosting company (externally) and I also setup Windows Small Business Server 2003 to run our webmail (OWA) so I purchased SSL certificate for the webmail address (i.e., webmail.abcd.com) and installed on the SBS server (internally), but I am having a problem that occurs when the internal network users try to access the http://webmail.abcd.com.  They can access the http://www.abcd.com address just fine, but not the webmail.  So, I just setup a record in the internal DNS server to point "Webmail" (http://webmail/) to the OWA hosting server and it works but the SSL certificate is not recognized because it is registered to webmail.abcd.com so it shows an error saying that the certificate is not valid.  The users can still get to their webmail but the SSL certificate error is always there.  How do I get around this problem?  Any advice will be greatly appreciated.  Thanks in advance!
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Question by:Jaime Bonilla
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Cliff Galiher earned 2000 total points
ID: 37041220
The most common way to resolve this problem is to create a new ZONE (not a record, but a zone) for webmail.abcd.com and then make the default A record point to the internal IP address of SBS. Then users can go to webmail.abcd.com and it won't pull the external address, which can cause confusion on some routers, but will pull the internal address instead. And since the certificate will now match, that works as well. Everything works as expected end to end in that type of setup.

-Cliff
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Author Closing Comment

by:Jaime Bonilla
ID: 37041284
Thank you very much!  I had tried adding abcd.com as a new zone in DNS but that had not worked because it then caused problems with users browsing to the www.abcd.com website.  But I had not thought of adding the complete "webmail.abcd.com" zone.  This works just fine.  

Thanks again for the quick and very helpful tip!
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