I need some help in this deployment of exchange 2007 server This is a business group with three different companies or departments (empresa01, empresa02 and empresa03) 3 independent vlans each with a separate windows domain, in a tree and forest independent created with Windows 2003 server and 2008 server ( depending on the department). These companies / departments have 3 mail domains (empresa01.com, empresa02.com, empresa03.com) with the peculiarity that there is no correspondence between departments and mail domains 1 to 1, but in empresa01, for example there are people who use email accounts empresa01.com, empresa02.com, empresa03.com. Additionally there is a remote office where there are users who used mail domains empresa01.com, empresa02.com and empresa03.com those who want to access via pop3 and optionally accesss by rpc on http. ineed to know whatI need to deploy an Exchange 2007 based solution, where and with wihc roles are the servers deployed. Thank you in advance for any help,