Script Download: 21946.zip
http://gallery.technet.microsoft.com/Send-Lync-Instant-Message-66e7bb22
This script will send an Instant Message to Lync Client Contact for User.
This script is to help users to send Instant Message via PowerShell when they are inconvenient with Lync Client UI.
You can find more All-In-One Script Framework script samples at http://aka.ms/onescriptingallery