Hello, I have 750 users (MS outlook). I plan to implement two mailbox server with Exchange server 2010. And I also use its HA solution. Please show me about hardware requirement (RAM, CPU) for these two mailbox servers. In case, one is failed then another mailbox server can work fine. Thanks in advance. Peace.

A lot of it depends on your IO and user profile model and what roles are installed on the server. The best tool to use is the Exchange Mailbox Calculator. http://msexchangeteam.com/archive/2009/11/09/453117.aspx Enter in your inputs and the other tabs will give you all the requirements. Tim Harrington - Catapult Systems - http://HowDoUC.blogspot.com

Thank you for your promtp response, Mr. Tim Harrington. -Peace