Installing the License Manager for a Floating License.

The installer for the License Manager not only creates the Service but tries to start it running automatically. Security systems will sometimes block the service from starting.
For automatic activation of the License Manager, encrypted data must be exchanged through port 80 over the internet. Security systems sometimes block that communication, so you must do a manual activation.
The ISV port must be unblocked or you will get a Connection refused at Server (-111) message when you launch ExtendSim.