В E2007 этот механизм называется Autodiscovery, O2007 умеет сам все находить.

В O2003 и E2003 есть Outlook 2003 PRF file.

The Outlook 2003 PRF file

Lode writes "When starting outlook for the first time we need to configure the outlook profile. By using a PRF file, you can automatically set up new profiles for new users or modify existing profiles without affecting other aspects of your Outlook (or Microsoft Office) installation. You can also manually edit a PRF file to customize Outlook to include Outlook settings or MAPI services that are not included in the Custom Installation Wizard user interface. The Outlook profile file (.PRF file) allows you to quickly create MAPI profiles for Outlook users.

The PRF file is a text file with syntax that Microsoft Outlook uses to automatically generate a profile To create an Outlook 2003 PRF file, you can configure profile settings in the Custom Installation Wizard, and then export the settings to a PRF file. It is however much easier to manipulate the PRF by yourself. A whitepaper about the prf can be found here