Access extern OWA URL from internally

Hi,

I want to use the external owa url in the internal network, but this didn't work.

We are using a exchange 2010 sp2 server infrastructure with OWA Publishing in the TMG 2010. The Internal and external urls are different.

For Extern we use mail.domain.de/owa and for intern owa.sub.domain.de/owa.

I have created a rule to publish the owa. Then I configure the listener to use the external and internal adapter for this rule.

Now I can access to the extern url from an external network. But I return an unspecified error when I access to the external url from the intranet.

In the TMG log I can see many initial and closed connection with an abortive shutdown.

In mytestscenarioall thishad worked well.

Have you some ideas or answers for me?

thx for help, Henry.