Windows Messenger 5.1 Planning and Deployment Guide
If you're trying to find out how to set up and deploy the new Windows Messenger client, have a look at this deployment guide which was released to the web yesterday. There is a discussion on spim prevention (unsolicited IM's), prevention of file transfers where the files aren't considered to be safe, or contain viruses, and how to set Group Policies to enable audio, video and data collaboration encryption. The guide should be read in conjunction with the Live Communications Server 2005 deployment resource guides.