Our exchange server is authoritative for several domains. Our sales staff mostly have Outlook 2003. We are just installing Exchange 2007 and will maintain a seperate database for 2 of the domains. Sometimes the sales staff needs to send email with their address being from @domain1 and other times @domain2. (This is not a case where the 'from' field can be used since they are sending as themselves, not on behalf of someone else.) Is there some method to achieve this? It would be particularly helpful if there was some way to reply with the domain name that the email was sent to, rather than having to choose which identity to use. Another issue would be duplication of email addresses in the GAL. Any thoughts would be appreciated. BTW- has anyone used the new exchange 2007 rules to separate out emails into different containers based on the email address it is sent to?