we want to host the recently purchased companies email. They currently are running exchange on a SBS with about 25 users should a second mail store be created for them and have the mx records point to our exchange server. I have created user accounts for the users with an email account on our server user@parentcompany.com and have set up an smtp forwarder that goes to their user@othercompanies.com email account. I think the ultimate goal really is to have it set up so the users at the purchased company can check emails and send emails as their current address but the mail come through to the parent companies email server. i guess i am looking for the best way to handle managing the second companies email solution.

1. Add the new company's SMTP domain in the accepted domains list.2. Set the new email address (your company's)as primary email address.3. Also add there new email address (new company's email address)Raj

The complicating factor here is SBS. It is more related to SBS as a whole than Exchange. Therefore is is best to post your question in SBS news groups (for links, see below). In order to give you an idea, there are some limitations with SBS: SBS must be the root of the Active directory forest and cannot have any Active Directory Trust with other domains or forests. Thus, with moving mailboxes over to your company Exchange server, you cannot create linked mailboxes with single sign-on. Also, the core SBS technologies must be run on the primary SBS box. You can move Exchange off to another server, but you loose some of the integrated features. For instance the automated monitoring reports will not work.The easiest approach would be to leave the SBS box alone and route all inbound and outbound Internet mail for SBS through your company SMTP gateway. If the security of the SBS remote access features don't live up to your company standards, you could add an ISA Server 2006 in front or implement two-factor authentication, with for instance Scorpion Software, whichis quite popular in the SBS world:http://www.scorpionsoft.com/products/authanvil/weblogon/Another easy approach would be to abandon SBS altogether and establish a child domain for the SBS company instead. There are upgrade options. For SBS 2003, you have the transition pack. However, before you do this you should look at how they are using their SBS: Fax Services,SharePoint and the Remote Web Workplace. Discussions in microsoft.public.windows.server.sbshttp://www.microsoft.com/communities/newsgroups/list/en-us/default.aspx?dg=microsoft.public.windows.server.sbs SBS 2008 News Group on Microsoft Connecthttps://connect.microsoft.com/sbs08/community/discussion/richui/default.aspx?wa=wsignin1.0 MCTS: Messaging | MCSE: S+M | Small Business Specialist