I recently experienced an interesting problem and an a relatively easy fix. We had setup the license server properly and the also generated licenses on the same issue date. The customer had 5 x AutoCAD and an additional AutoCAD x 1 on the license server.
In this instance, the server name in one of the license files was UPPERCASE and the other license file, the server name in was lowercase. The license file was then combined manually using Notepad. In theory, this should have worked but the server would not start and the lmgrd.exe would not start.
The solution was to:
1. Remove the duplicate server lines from the license file.
SERVER YOUR-server-NAME 00xx00xx00xx00
VENDOR adskflex port=2080
2. Change the server name so that they are exactly it has the same case.
The problematic license file is below:
Thanks to Chantal Seguin for confirming that this solution worked.