You can set expiry dates for existing services manually, or, set expiry information for new services in one of the following ways:

• Through the Default Attributes policy, which you can use to assign new services to an expiry group
• Through a completion workflow with a Set Expiry Date step
• When manually deploying a requested service, or when manually cloning a VM

http://www.embotics.com/documentation/index.html?managing_an_expiry_date.htm