The display and borrowing of ArcGIS licenses runs very slowly. It can take several minutes until all information is displayed. It has also been observed that the available licenses were displayed incompletely.
Affected is ArcGIS Administrator 2022.0, which is installed with ArcGIS 10.8.1. Earlier versions do not seem to be affected by this effect.
We do not know the exact cause, but it has something to do with the ports.
Often only the name of the license server is specified in ArcGIS Administrator. However, under ArcGIS 10.8.1 this results in a very slow response time behavior.
Prefixing the port causes ArcGIS Administrator 2022.0 to respond smoothly again!
At Esri there is also the following info in the documentation: