Microsoft updates corporate IM | CNET News.com: "he new enterprise IM client, code-named Istanbul, resembles the Windows Messenger software that's currently found in Windows XP. The difference is that a user's IM information is synchronized with Outlook's calendar and scheduling information. Istanbul further connects to common desk phones and serves up an alert when someone calls. People can then route the call to their cell phone or voice mail box.
Istanbul is a feature within Microsoft's Live Communications Server 2005, software that initially launched as a way for companies to offer secure IM to their employees."