Can't use IE externally but Firefox works for OWA 2007?

[lance59]

We can access OWA internally using IE or Firefox. We have ports 80/443 open and have a SSL certificate installed

From outside we can use Firefox to log in just fine.

Using IE from outside we get http error 400 (This error (HTTP 400 Bad Request) means that Internet Explorer was able to connect to the web server, but the webpage could not be found because of a problem with the address.)

We can get to the logon screen, type our domain\user name and password, then get the error above. We have tried various IE security setting, but get the same results.

Any ideas?

TIA

 

[lance59]

FYI, I stumbled upon this on MS TechNet site.

Part of the answer is that when using Firefox the IIS redirects the client to the

https://.../owa

page if the user uses

https://.../exchange.

But if using IE and

https://.../exchange

it does not.

But using

https://.../owa

works for IE users. I don't know why IIS does not redirect the IE users.

Anyone have an answer for the redirect question?

Thanks

 

[Zelandakh]

Do you get any events logged on the CAS?