I need to transfer an old Quartus license to a new license server. How do I re-issue the license for the new server?

Transferring products from one computer to another is called rehosting your license. Software and IP licenses can be transferred to a different PC by going to the Create New License section on the Self-Service Licensing Center page. The listing of product licenses on this page includes the available rehosts. Select the products you want to transfer and then click Assign Computer.

https://www.intel.com/content/dam/www/programmable/us/en/pdfs/education/demonstrations/online/licensing/how-to-perform-a-rehost.pdf