Hello gkendall and welcome to Seven Forums.
From what I could find out, this is a legitimate program from Microsoft. It was designed to be a replacement for Windows Messenger and is meant to be used in an office/corporate environment. Microsoft Office Communicator 2007 R2 Product Overview - Communicator - Office.com
If what you have really is a legitimate program you should be able to uninstall it from control panel > programs and features unless this is installed on a company computer by an IT department.