For most environments, the most commonly used feature in the Microsoft Communicator client is Instant Messaging. This function enables users to stop cluttering mailboxes with “where do you want to go for lunch?”-type messages and enables users to limit their messages to only people who are likely to respond quickly. This also is where accurate presence information comes in handy.
Starting an IM conversation is as simple as double-clicking a contact. Doing so launches the IM window, which defaults to the IM tab, as shown in Figure 22.5.
The IM client works like any other IM client. You can see the status information for the person to which you are communicating, and there are two areas in the window: one to type in and one to display the conversation. Users have access to the usual features such as altering the font, color, and size of the text as well as a menu of emoticons.