If you are using InstallShield version 2014 and newer, you can process your offline request using below URL (on any machine with internet): https://flexerasoftware.flexnetoperations.com/control/inst/offlineActivation For older versions (2013 and older), I think OActivations@flexerasoftware.com should work. You can also email to support@flexerasoftware.com or you can call the support number and will help you activate InstallShield, regardless of a maintenance plan or your use of an End of Life version of InstallShield. ... View more