Question : Connecting Outlook 2007 to Exchange 2010 a Password is required each time outlook is opened

Hello,
I have recently migrated from SBS2003 to a Server 2008 box running Exchange 2010.  I am working through the little stuff now and I cannot seem to find a solution for this.

When I open Outlook 2007 from a clients machine I am prompted for a username and password everytime.  Once the username and password is entered everything seems OK except when doing a send/recieve I get the error "Task '[email protected]' reported error (0x8004010F) : 'The operation failed. An object could not be found"  This error does not seem to cause any issues sending or recieving mail but I thought I would include it.  

What I am wanting her is for the windows credentials to automatically pass through to the Exchange servers so the users do not need to enter the password at all whne opening Outlook.

 I have seen numerous articles on the settings in IIS and setting the authenication to Windows enable with the kerbos box checked...Did not work.  Also I have checked the cert for allof the appropriate names and everything looks good there.  I am creating the cert then signing it using another 2008 server configured as the Certificate Authority to sign it.  This is all in a test environment as I am trying to get everything ironed out before performing the actual migration.

Any help or advise would be greatly appriciated.
Thank in advance...

Answer : Connecting Outlook 2007 to Exchange 2010 a Password is required each time outlook is opened

Fine, since the web distribution is grayed out we will create a new oab

Create a new oab, enabled web based distribution and make it as default.. This should work..