yup - install at own risk.
run a test bench - otherwise 2003 it is!
Senario
Installer: Ring Ring - "Hello - Avaya Support" - "Hello, I seem to have an issue with reports in CCR."
Avaya: "well, can you advise in more detail, like, what OS do you have this installed on?"
Installer: "Server 2008."
Avaya: "Im sorry sir but that isnt a supported OS yet, good bye..."
*click* - duuuuuuhhhh
Installer: "Hello?"
So, get downgrading that licence!