I have Exchange 2007 SP1 installed on Server 2008, I have outlook Anywhere implemented, which only works for users who have domain admins rights, for a user which is only memeber of Domain Users group, outlook anywhere doesnt work, it keep asking for password and doesnt authenticate, as soon as make that user a member of domain admin group, it starts working with no problems.I am using NTLM authentication only (by default behaviour in Exchange 2007 SP1), with private certificate generated from microsoft CA, that CA isnt the part of this domain or has any relationship with this domain.user with domain users rights have no issues logging onto the domain or accessing there emails over LAN.There are no events logged in the event viewer on the server or the client.any ideas..?

Dear Muhammad ,please go through this tutorial .http://www.exchange-genie.com/2008/02/configuring-outlook-anywhere-for-exchange-2007-sp1/http://msexchangeteam.com/archive/2008/06/20/449053.aspx.regards SAsyed.arsalan

Hi Muhammad,Did youdisable Kernel Mode Authentication for Client Access servers?You can find something details in How to Enable Outlook Anywherehttp://technet.microsoft.com/en-us/library/bb123889.aspxFrank Wang

Hi,Is your users are configured to use proxy server in their IE (Internet Explorer)? If so,try to disable it and test-autoconfiguration to see if the autodiscover service is working.Regards,LRMCP

I dought there coluld be a problem with IIS, this issue comes due to Insufficient permissions on IIS.any changes done on IIS?

No changes have been made to IIS, I have recently installed SP2 but that also didnt resolve this issue. Many people have pointed out KERNAL MODE Authentication which is addressed in SP2.any other ideas?