Outlook compatible instant messaging application

Is it possible to develop a software that is compatible with Outlook开发者_StackOverflow中文版 and that will provide presence and IM infrastructure to Outlook like MSN Messenger / Communicator etc.

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Yes, it should be possbile with Outlook 2007 and Exchange Server.

http://office.microsoft.com/en-ca/outlook-help/use-instant-messaging-services-with-outlook-HP001233551.aspx