Instructions
1) Open the ArcGIS Administrator program.
2) On the left-hand side, click Desktop. Change the "License Manager" value to esri.licensing.itts.ttu.edu.
3) Click OK.
Outcome
If your computer is owned by TTU and is connected to the TTUnet network, the license will be authorized.
TIP: To verify the connection to the license manager, you can click availability to see the number of licenses available.