In this case, it seems like your machine has no internet access, and can't request a key from my.inedo.com; you can do it manually from that website.

Activation invalidates when the MachineUUID (MAC Address + CPU-ID) changes; in some virtual hosts (VM Ware), we've seen the MAC change randomly... but it's a setting that you can control.

You can do this from the Admin page under "Licensing & Activation". If there is no internet connection once you click "Activate", it will bring up instructions on how to manually activate.

This is caused when BuildMaster cannot determine the CPU ID or MAC address of the server it is installed on. Here is a detailed description: http://inedo.com/support/kb/1005/this-machine-cannot-be-uniquely-identified Typically, restarting the server fixes this problem. If that still doesn't work, you can also try the following steps to resolve: Stop the Windows Management Instrumentation service. Go to the %SystemRoot%\System32\Wbem\Repository folder. Delete all of the files that are in the %SystemRoot%\System32\Wbem\Repository folder. Restart the computer. The files that were deleted are recreated when the computer restarts. The Windows Management Instrumentation service will start automatically when you restart the computer. (These steps were taken from: http://minasi.com/forum/topic.asp?TOPIC_ID=5772)

I talked with our IT HUG and he changes the MAC address setting from dynamic to static. I hope this will solve the problem. Thank you.

Normally you only need to activate if you have a new license key or if the hardware on the BuildMaster server has changed significantly (a different CPU and/or primary network card), and there is a 7-day grace period after setting a new key before activation is required. Basically, you just need to activate after setting a new license key - and there is no harm in activating multiple times.