Dear Experts, Its required the HUB role on the NLB Regards, sachin Sachin Hodge

Exchange 2007 RTM does not support NLB of the Hub Transport rolehttp://technet.microsoft.com/en-us/library/bb510126.aspx however this will most likely change in SP1 For furter refer this URLhttp://www.msexchange.org/articles_tutorials/exchange-server-2007/planning-architecture/load-balancing-exchange-2007-sp1-hub-transport-servers-windows-network-load-balancing-technology-part1.htmlhttp://www.exchange-genie.com/2007/07/nlb-and-hub-transport/