To assign a new license to the servers you selected, choose the license edition, enter the license server details, and then click OK
License Edition
 
 Citrix XenServer Advanced Edition
 Citrix XenServer Enterprise Edition
 Citrix XenServer Platinum Edition
 Citrix XenServer for XenDesktop
 
License Server
 
Enter the name or IP address of the license server:
Name:
Port number: