2227: W3 event CAL SSL exceeded
The IIS web sites that use HTTP rely on several IIS components for their availability. The IIS World Wide Web Publishing Service (W3SVC) is one among them. The W3SVC is responsible for managing the HTTP protocol and HTTP performance counters.
Event 2227 is generated when the server was unable to acquire a license for a SSL connection.
How could you resolve this situation?
You would have to either reduce the number of connections or purchase more CALs (Client Access Licenses).