Hello all i need a help in something i am in the process of migration from ex2k3 to ex2k7 and actually i am stuck and confused in configuring the autodiscover and Availability service and UM certificatefor the exchange 2007 so does anyone please have a good article i can follow to configure them? Note: i have 2 servers holding Hub-Cas roles in NLB Mode waiting for any reply thanx

Absolutely! White Paper: Exchange 2007 Autodiscover Service:http://technet.microsoft.com/en-us/library/bb332063(EXCHG.80).aspx I also reference this article often:More on Exchange 2007 and certificates - with real world scenario http://msexchangeteam.com/archive/2007/07/02/445698.aspx