Hi all I want to enable Auto discovery services for only internal users in our domain..means when users login on domain outlook automatically configure rather to configure it manually..can any budy help me out please.

Pretty easy. You will need to create an A record in DNS to point to your CAS server's IP address. So the entry should be name: autodiscover.domain.local ip address: ip address of the CAS This should fix your problem. You can read up on the following links http://technet.microsoft.com/en-us/library/bb232838(EXCHG.80).aspx http://msexchangeteam.com/archive/2007/04/30/438249.aspx

Thanks for your reply Michael..PLease tell me one thing let says my domain name is abc.edu.pk first i create a dns record with autodiscover.abc.edu.pk and point to CAS server ip adress . then when i start the outlook will it automatically detect the outlook profile..isn't it ?

Take a look at this: http://technet.microsoft.com/en-us/library/bb232838%28EXCHG.80%29.aspx.

Thanks for your reply Michael..PLease tell me one thing let says my domain name is abc.edu.pk first i create a dns record with autodiscover.abc.edu.pk and point to CAS server ip adress . then when i start the outlook will it automatically detect the outlook profile..isn't it ? That is correct. Autodiscover should gather your WinNT credential and pass it on to the CAS and the CAS with verify with AD to make sure you have a mailbox.