How do I keep Microsoft Office Communicator from turning red?

Well, one thing that will help will be to set the "Show me as Inactive when my computer has been idle for this many minutes" and "Show me as Away when my status has been Inactive for this many minutes" settings to their maximum values of 60 minutes a piece. To do this, click on the arrow next to the big circular traffic lightesque light that shows your status at the Communicator window and then pick Options... (The settings mentioned are in the Personal options.)