I’m using Enterprise Edition; can I get an email when my license expires?
Whenever you launch Admin Module you get notification if license is going to expire within configured time.
Product provides customization API using which email alerts can be send when license expires
You can get License Expiry Notification Marquee Message in Admin Page, if License is going to expire.
You can also create Custom Alert - As Amit mentioned above.
Also, When you set up AssistEdge Community or Enterprise, while license generation you will get details of Licenses.