Each license version of product family may have a limit on the quantity that can be installed on any given machine or registration certificate. This limit is most commonly used for hardware-related products limited by the number of ports on the machine.
For example, if a machine can only support a quantity of 400 of a messaging system, and three products belong to the messaging family, then if 300 of messaging product 1 is installed, then when a user installs messaging product 2, they can only install up to 100.
You manage these restrictions from the List Product Family Activation Limits page. To display the page:
To add or edit a product family activation limit:
To edit an activation limit, click the Edit link for the limit you want to edit.
Each combination of family and version must be unique.
If you do not specify a version, then the limit applies to all versions of the product family.