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Exchange 2010 OAB and Cisco ASA 5510

Running out of ideas, we have spent over 20 hours with Microsoft Exchange Support on this issue.  We have a new Exchange 2010 server which is working and in production.  It is in coexhistance with Exchange 2003 and CAS is working between two servers.  However the OAB will NOT distribute to Outlook 2007/2010 clients for Exch 2010 users (outside of the domain).  Microsot paid support has spent endless hours going through settings and they are now saying it is a firewall issue (because domain joined PC can download the OAB..just https/rpc clients cannnot)  We have a Cisco asa 5510 as the firewall, our isp gave us an interface public IP w/ a CIDR block of which we are using one of the static IP's to static nat ports 443 and 80 to exchange.   Any ideas?  we can download the oab xml file via http://mail.xxx.com/guid/oab.xml from the internet.. Hopefully someone has an idea of what could be causing this problem in our Cisco.

thanks
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corpdsinc
Asked:
corpdsinc
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1 Solution
 
Ernie BeekExpertCommented:
Is anything showing in the logs of the ASA when a client tries to get the OAB?
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corpdsincAuthor Commented:
Worked with msft again last night and found that outlook 2003 and 2010 can both download the oab , but Outlook 2007 cannot.   So strange.
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corpdsincAuthor Commented:
This issue is now resolved.  The issue was that autodiscover.domain.com was created but not autodiscover.domain.NET was not.   Creating the second A record and adding that domain to the SSL cert fixed the issue.  Took MSFT 2 weeks to figure it out, but it actually was very simple.  
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corpdsincAuthor Commented:
Closing as it was resolved by Microsoft Paid Support
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