Hi there Conor,

According to AutoCad Knowledge Base you can follow the following procedure to change your license server:

1. You will need to setup a license server.  Please review the steps below:
   • Quick Start: Setting up a license server on Windows

    

   • Quick Start: Setting up a license server on Mac

    

   • Quick Start: Setting up a licensing server on Linux

    

    

1. You will need to get a new license file for your products. Our license files are coded to MAC addresses of the new computer See: General Licensing: Requesting a network license online

1. Configure LMTOOLS for the new license.

1. Update your deployments to point to the new server.

1. Update your client computers and make sure your existing installations point to the new server. See: General Licensing: ADSKFLEX_LICENSE_FILE environment variable location in Windows registry.
   • Right-click the My Computer icon.

    

   • Click the Advanced tab.

    

   • Click Environment Variables.

    

   • Under the System Variables window, click New.

    

   • In the Variable name field enter ADSKFLEX_LICENSE_FILE

    

   • In the Variable value field enter @YOUR COMPUTER NAME

    

   • Click Okay.

    

    

1. You can also update your client computers by editing the licpath.lic files in C:\Program Files\Autodesk\

1. Retire the old license server.

Hope this helps 🙂