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Exchange 2010- Communication Issue from DMZ to internal domain

Back ground information: I was to set up to exchange 2010 servers; One with HUB and CAS (we will call it Joker) and the other Mail server (we will call it Batman).
The mail server is to be located within the internal domain (XXXX.ad)

I set up both servers internal and both have (xxxx.ad &xxx.ad) names. I had them communicating to each other and connection to the internal domain controller’s fine.
Then I was approached that for security reasons I should move the "front -end" server (HUB/CAS- Joker) into the DMZ but keep the mail server (batman) internal. After long agreement I moved the Joker server into the dmz. Now I can not communicate with the internal DC's to authenticate and regain the communication for the complete exchange system.

Error: I have the following error from a server within the DMZ. (Please see image).

Setup...
DMZ- (xxxx.org)
OS server- Win 2K8 R2 Server
Exchange 2010 server Hub & CAS – “Joker”
Local DNS within DMZ (no trust built with internal domain)
I’ve added a new zone XXX.ad and added an “Host A” record for “Joker”.

**Also, we have an external facing DNS (external IP address, not trust to the internal domain). This is used for OWA communication.**

Internal- (XXX.ad)
Domain connection, all DC’s and Exchange 2010 Mail server.

Perimeter Firewall Routing from DMZ to internal:
ASA5520- Interface to DMZ (10.10.X.X)- Joker
ASA5520- Interface to Internal (10.100.X.X)-
ISA 2006- Second Firewall (192.X.X.X)- Internal domain XXX.ad –
– Batman, DC’s and Domain.




Exchange-DMZ-error.bmp
SOLUTION
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Awinish
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ASKER

Thank  you for that... is there anyway, after moving the server back into the domain to publish OWA. Though its not recommended placing two nics on the server with an ip address of DMZ and also one internal may help but that breaks security, right?
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I have an anti-spam device in place of edge, Ironmail 6.7 version... I'm working to find if ironmail will allow OWA throw. No solution just yet... Anyone work with edge; do I need additional licensing?
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This question has been classified as abandoned and is being closed as part of the Cleanup Program. See my comment at the end of the question for more details.