Outlook Anywhere not working for one AD site

Hello:

We are transitioning from Exchange 2007 to 2010.  We have 1 AD domain and 4 AD sites.  Each site has Exchange installed.  The larger sites have the roles separated, with the smaller sites combining CAS and Hub.  I have one small site that Outlook Anywhere does not work from outside of the network.  I have confirmed that OA works inside, as well as TCP working both inside and out (via VPN).

I have checked the log files and cannot find any problems.  I have tried disabling OA, uninstalling RPC-Proxy, removing IIS directories, reboot, etc etc several times.  It didn't help.  I have been all over testexchangeconnectivity.com.  It reports that OA can connect fine.

I'm not sure what to do next.  Maybe I'm looking at the wrong thing?  Not CAS?  I can move mailboxes from this site to other sites and connect just fine.  Not sure what to do.

Thanks in Advance-

Dan
ddotsonAsked:
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florin_sCommented:
In your 2010 CAS servers you configure Outlook Anywhere, ActiveSync and OWA properly using mail.company.com. On the 2007 CAS servers, disable Outlook Anywhere and configure the external urls of the Virtual Directories for ActiveSync, OWA, EWS, etc. with outlook.company.com.

Did you do the above? If yes, is there any hardware load balancer in that site?
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ddotsonAuthor Commented:
The 2007 CAS servers are using "legacy.company.com".  Each site still has 2007 in production, and they are working properly.

There is not a load balancer, however, I did configure a CAS array (with 1 CAS server).
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florin_sCommented:
The CAS array is not an issue here, this explains: http://blogs.technet.com/b/exchange/archive/2012/03/23/demystifying-the-cas-array-object-part-1.aspx

As for the site were the outlook anywhere dose not work, is it an internet facing site?, have you applied SP2RU3? if yes here is a scenario that can help:
http://support.microsoft.com/kb/2725008

Here is an article that describes how to generate an outlook anywhere report(also a script)
http://gsexdev.blogspot.ro/2010/02/outlook-anywhere-logon-report.html
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ddotsonAuthor Commented:
I removed the CAS array and it started working.  I then re-enabled the CAS array, moved the mailbox to another site and then back.  It seems to be working.  I discovered that I didn't setup a CAS array for another similar site.  I set that up and I am having the exact same problems.  I've followed the guides on how to setup a CAS array after the database has been created.  I've moved my test users away from the database and then back.  Still doesn't work.

We are running SP3, RU2.  I read through the support article about disabling OA for non-internet facing sites.  I don't know if that applies to us, however, I tried it anyway.  Didn't seem to help at all.

I looked at your third suggestion.  I ran the script, but I don't know which log file to run it against.  The author doesn't really say what log file to run it against.

I may try removing the array from the second site and re-adding it...  Seems kludgy.  What do you think?
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ddotsonAuthor Commented:
I uninstalled RPC-Proxy from the second site and reinstalled it.  Everything started working.  

Talk about shooting in the dark.  No functional error logs, etc.
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ddotsonAuthor Commented:
Resolved it myself.
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