MOSS 2007, My Inbox web part auto login

I'm using MOSS 2007 and Exchange 2007.

Trying to get the "My Inbox" OWA web part for MOSS to auto-login based on the current user who is logged into SharePoint without any luck.

I've followed some recommendations to 1) Use HTTP site for backend Exchange server, 2) add this site to the Trusted Sites.  Despite doing this, I constantly have to force users to login to the OWA web part after getting into the Sharepoint site.  Does anyone have any ideas here?
Antares763Asked:
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quihongCommented:
You want to point the webpart to the internal Exchange server hosting the particular user's inbox.

Take SharePoint out of the equation and verify that you can open the inbox directly via the URL of the Internal Exchange server. Assuming you are using Integrated Authentication it should open right up. Once you get that working, then config the web part.
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Antares763Author Commented:
It looks like it is set to Forms Based Auth. In other words when I open the OWA site directly I get the main OWA forms login.  I unfortunately am not sure I can change the authentication method for this, since it will affect the main address people are going to (HTTPS) to login.
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quihongCommented:
Not sure the details of your Exchange ENV but for us, we have a outward internet facing OWA site and then we have a bunch of Exchange Servers internally. Point to your internal exchange server URL not the external OWA server. The internal Exchange Server, I hope doesn't use FBA, does it?
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quihongCommented:
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Antares763Author Commented:
We have a very small organization compared to that. Our DC is SBS 2008 which runs Exchange. We don't have a separate front end server, everything runs off the one server.

Thanks
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RHADMINCommented:
  1. (Quote: quihong:)...Assuming you are using Integrated Authentication it should open right up.. - which may solve my problem as well, the problem is the exchange server is actually serving extranal users using URL like(https://webmail.abc.com/owa) which is using Form Authentication.
  2. Q: How I can use Form Authentication and Integrated Authentication at the same time?
Thanks,
-Rick
 
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Antares763Author Commented:
RHADMIN - yes exactly. If there was a way to do both FBA and Integrated for OWA this should theoretically solve both our problems with this.
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quihongCommented:
I am not an Exchange Admin and not familiar at all with SBS, but can't you just create another Web Server instance (using host headers, or a different port) that uses integrated authentication?
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Antares763Author Commented:
This appears to have done the trick; although I need to do quite a bit more testing. Thanks for the quick suggestions all. I will let you know today if this ended up doing the trick.
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HairbrushCommented:
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.
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