When the Floating License Server is stopped, a client immediately receives a corresponding message and the GeneSpring installation closes after 10 minutes. However,  if the Floating License Server is started again within 10 minutes, the client will attempt to connect  with the Floating License Server without closing the installation.

Yes, to be able to add a new license, you have to stop the server. Please follow these steps to add a new license to the Floating License Server:

The current status of license usage can be monitored from the Users section of the Floating License Server.

A client should do the following to access the new Floating License Server:

Yes, this can be done by the Floating License Server administrator from Floating License Server -> Users -> Remove.

You can block or allocate a specific set of licenses to specific users using the Group functionality available from the Group Manager in the Floating License Server.
 
By default, any user connecting to the Floating License Server has access to all the licensed modules. You may create a specific group to allocate only a specific set of licenses by creating a group, specifying the licenses and adding members (users) to the group.

Yes, this feature is available in the GeneSpring Floating License Server for version 12.6. To use this feature, you need to have the following:

• Floating License Server for version 12.6 installed.
• GeneSpring 12.6 client.