Hello, We are planning a deployment of 2 servers (without DAG) with exchange 2010 standard. We thought about one CAS server, and one Mailbox and HUB server (both to them virtual machines), do you think is the "best" configuration for it? thanks in advanced, any suggestions will be apreciate

Well, if sizing shows that all user mailboxes will fit nicely on a single mailbox server, I'd put the Hub and CAS together on one machine with the mailbox role on the other. Hub and CAS play together nicely since they mix processor, memory and disk usage well.Neil Hobson | Principal Consultant | Silversands | www.silversands.co.uk | www.msexchange.org/neil_hobson

I agree with Neil, if there's no need for HA then do it this way Or else I would put all roles on both servers and used DAG and CASARRAY but there's a need for HW LB in that case Jonas Andersson MCTS: Microsoft Exchange Server 2007/2010 | MCITP: EMA 2007/2010 | MCSE/MCSA Blog: http://www.testlabs.se/blog

Ok, thanks for all. This is in the process of migration from one Exchange 2003 server to the 2 exchange 2010 servers mentioned. Looking at official documentation, its said that when you deploy the CAS server, automatically a connector is configure just to flow mail between the 2 servers (legacy and new one). But, the mail will going working without configuring anything more?, just only from the legacy ones, i mean. Is there no impact when i deploy the CAS server with exchange 2010?, Outlook 2003/2007 will continue working at that moment without problem?... thanks in advanced

Hi Jungle_men, Sure, if you deploy the exchange 2010 CAS server in your exchange system, there is no impact for your scenario, but there are some confiuration on the CAS for the legacy exchange server. Some good information on the technet, http://technet.microsoft.com/en-us/library/ff805040.aspx If you deploy all the exchange 2010 server roles successfully, and you want to use the exchange 2010 CAS for the external users, then you need other configuration. Regards! Gavin