Hi Natestack,
Maybe the forum messed with the content you pasted, but there should be square brackets ('[' and ']') around the registry key, and the quotes around "Lync" and before "C:\Program Files\..." should be straight quotes instead of curly ones. Also, the standard UEM boilerplate content for .REG files is missing.
Just to make sure, can you post the config file you're using as an attachment, and also a FlexEngine log (at log level DEBUG) for a session in which you apply this setting?