I'm looking to combinethe hub, client, and mailbox server roles for remote sites with few user's (from 10 to 50 user's per site.) Will the standard editions of Windows and Exchange suffice, or do multi role implementations require one or the other to be enterprise? Ted

You can install Exchange Standard and Windows Standard Edition with those roles without problems, butyou need to consider the performance, one problem with this kind of installations is not realize that Windows Standard edittion only supports 4 gb RAM. greetings

Hi, Please refer to the below article: Exchange 2007 System Requirements http://technet.microsoft.com/en-us/library/aa996719(EXCHG.80).aspx Exchange Server 2007 Editions and Client Access Licenses http://www.microsoft.com/exchange/evaluation/editions.mspx Hope it helps. Xiu