There is no good reason this shouldn’t work out of the box, but I run 2K3 Server as my primary machine at work and can’t try out Microsoft’s fruity new Messenger app. The MSI is hardcoded to block server OSes, which is complete and utter shenanigans.
The instructions in this post from Techspot work well for Windows Live Messenger 8.5, but you’ll have to dredge through the comments to find a working version of WLM 9. Since it’s hosted on one of those free file sharing services, I figured I’d mirror the .msi and try and dredge up some search engine hits. I’ve scanned it with Symantec Endpoint Protection and it came up clean. Thanks to Quasim for the original file.
The installer should work on any ‘unsupported’ OS, such as XP x64, Server 2003 and Server 2008.