Microsoft Exchange Server 2007 Standard Edition (1 Server/s)
Exchange Server 2007 Standard 64-Bit English on DVD with 5-ClientsThe Exchange Server Standard CAL provides access to e-mail, shared calendaring, contacts, tasks, management, and Outlook Web Access. ...
Pros: Seamless integration with ADS Exchange 2003, and Outlook 2003/2007
Cons: Scant documentation on the Exchange Management Shell command syntax.