I've seen a lot of articles about integrating Outlook 2010 with Windows Live Messenger 2011. While this appears to be very easy, I'm running into a problem because the windows live IDs of my contacts are different from our exchange account IDs. For example, my contact is firstname.lastname@example.org, but his live account is email@example.com. When I try to "begin a conversation" from within Outlook 2010, Outlook tries to look for a "Windows Live" contact named firstname.lastname@example.org which doesn't exist.
Is there any way to synchronize the two? Ideally I'd like to be able to "associate" email@example.com with firstname.lastname@example.org so that I can initiate an IM conversation from within Outlook.