Been wondering the same thing myself......I see entries in the SolidWorks license manager...I wonder if there's an option to run it through there and see the users like you can for SolidWorks.
1. How to check how many license available in server ?
A: Open the admin tool and click on the License node. The number of licenses will be shown...
2. How we can know username that take license from the server ?
A: run a search for logged in users. This will tell you who has licenses (there is not a better tool)
3. Is there any warning message when the number of login user is full / license is empty ?
A: yes, if you attempt to login you will receive a warning that no license is available.
Hope there will bee a better tool in thr featureAtso check user that use a licence,