When you start an Autodesk product, it requests a license from the license server through the TCP/IP network . If the number of available licenses has not been exceeded, the Network License Manager assigns a license to the computer, and the number of available licenses on the license server is reduced by one.

Likewise, when you exit a product, the license returns to the Network License Manager. If you run multiple sessions of an Autodesk product on an individual computer, only one license is used. When the last session is closed, the license is released.

The following three processes manage the distribution and availability of licenses:

• License manager daemon (lmgrd or lmgrd.exe) handles the original contact with the application, and then passes the connection to the vendor daemon. By using this approach, a single lmgrd daemon can be used by multiple software vendors to provide license authentication. The lmgrd daemon starts and restarts the vendor daemons as needed.
• Autodesk vendor daemon (adskflex or adskflex.exe) tracks the Autodesk licenses that are checked out and the computers that are using them. Each software vendor has a unique vendor daemon to manage vendor-specific licensing.
  NoteIf the adskflex vendor daemon terminates for any reason, all users lose their licenses until lmgrd restarts the vendor daemon or until the problem causing the termination is resolved.
• License file is a text file that has vendor-specific license information.