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OWA getting a http 400 Bad Request

I've installed a new Exchange 2007 server into our exchange 2003 environment. Everything works great...except the new Exchnage 2007 OWA. I get the logon screen, however once it logs in I get:
http: 400 Bad Request on /owa/auth/owaauth.dll

And that's it...
The server is running Windows 64bit; net 2.0 64bit version...

Thanks

consultkhan

Hi,

owa MUST use form based authentication.check the authentication on cas and hub.
IF nothing works,you need to re-install the cas and hub role (or just CAS if it not combined)

setup.com/mode:Uninstall /roles:c,ht(remove ht if just cas is installed)
thanks.

paulheinisch

ASKER

I made sure that form authentication was on...and it is...

consultkhan

have you tried re-installing ?

paulheinisch

ASKER

Re-install exchange full - no I can't do that...is there a way to just resetup the OWA without reinstalled all of Exchange 2007?

ASKER CERTIFIED SOLUTION

paulheinisch

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ASW3382

Just wanted to comment here I had the same issue but for me the fix was in creating a proper DNS entry. I had been testing an exchange server on a different subnet. Once I created the proper zone and A record the error went away. Hope this helps someone else as I found a LOT of forums with this question.
Also dont forget that the OWA VD has different permissions by design than the Exchange VD.