HTTP access from Outlook
When used with the Microsoft Windows Server™ 2003 RPC Proxy Service and Exchange 2003, Outlook 2003 clients can connect simply using HTTP or HTTPS, thereby reducing the need for virtual private networks (VPNs) or dial-up remote access. If remote users only need to gain access to corporate messaging information, your IT department does not need to deploy VPN infrastructure. VPN-less access reduces costs and provides for increased security by ensuring that remote Outlook users don’t need access to the entire network. This unifies the connection methods also found in Microsoft Office Outlook Web Access and Outlook Mobile Access.