Question : Outlook autodiscover popup issue - SBS 2008/Exchange 2007

Ok, here we go..  The main problem is my outlook clients are getting username/password popups constantly.  I have created, bought, and installed a UCC via exchange management shell for mail.mydomain.com, autodiscover.mydomain.com, and myserver.mydomain.local

1)  I am under the impression that it is an autodiscover issue, and I use the following commands to update the autodiscover properties:

Set-ClientAccessServer -Identity CAS1 -AutodiscoverServiceInternalUri https://webmail.mycompany.com/autodiscover/autodiscover.xml

Set-WebServicesVirtualDirectory -Identity CAS1\EWS (Default Web Site) -InternalUrl https://webmail.mycompany.com/ews/exchange.asmx

Set-OABVirtualDirectory -Identity CAS1\oab (Default Web Site) -InternalUrl https://webmail.mycompany.com/oab

Set-UMVirtualDirectory -Identity CAS1\unifiedmessaging (Default Web Site) -InternalUrl https://webmail.mycompany.com/unifiedmessaging/service.asmx

The first command entered successfully, the last 3 errors out saying "default web site could not be found on domain controller"

2)  I have also been told to go in IIS on the Exchange server.  (since it is SBS its all the same server)  Under Autodiscover properties> Directory Security> Authentication Methods> check "Integrated Windows Authentication".

well, I cant seem to find the autodiscover virtual server to view the properties.

 I hope this makes some sort of sense, please feel free to ask any questions you need to help me sort this out.

Answer : Outlook autodiscover popup issue - SBS 2008/Exchange 2007

Exchange 2007 Service Pack 1 Rollup 9 should solve your username / password popup issue.  Please download and install it:

http://www.microsoft.com/downloads/details.aspx?FamilyID=55320be2-c65c-48bb-bab8-6335aa7d008c&displaylang=en