My previous post talks about Installation of Cisco Unified Communication manager 7.0 under VMWare. Once you have installed UCM under VMWare, Cisco gives 150 free license units from its demo licenses. As you keep adding phones and enable various services, these license units gets consumed. Once the license unit count reaches to zero; you can not add any more devices in the pool.

License file given by cisco is tied with MAC address of the device it is assigned for. You can not use the same license file on any other UCM machine unless you spoof the MAC address. Hmmm, Now you must be thinking, spoofing MAC address is very simple and can be done in 2 shell commands. Yes, you are right but guys one need root privileges to change the MAC address and UCM do not allow to add new user or to login from root user