License can be activated for a limited period of time only.
By default, protected application is permanently activated on remote machine.
However, if case you are renting or leasing your software or just want to force your client to contact you for new activation code from time to time this is not acceptable behavior.
Limited license feature provides ways for additionally restricting license usage.
Please see limited license settings for more information about limitations you can use.
License will expire as soon as one of enabled limitations is reached.
Protected application will generate different Site/MID codes and require new and different activation code after license expires.
Limited license can be converted to permanent license with activation code with "Disable limited license" special flag enabled.