Follow these steps to change the license server for your already installed Ansys software.
Launch Ansys license utility by typing “anslic” into the Windows search bar. The utility must be launched as an Administrator. Right click on Client ANSLIC_Admin Utility>Launch as Administrator:
Click “Specify the License Server Machine:
Click on the current license server and select “Edit Selected Server Machine”:
Enter the new license server info:
Done. You should now be able to launch your Ansys products as normal.