Hi Lisa, I've managed to get out system working somehow ! Here's what I did :
1. I re installed the license manager to see if it could change anything (and I configured it this time to the 8080 port for accessing the GUI).
2. I realized that we needed to open the appropriate ports (8080, the license manager port, as well as the vendor daemon's port which can be found in the vendor daemon configurations) for several of the programs contained within the FLEXnet installation. Thus the three aforementioned ports were open for the lmadmin service, as well as these programs : lmadmin.exe, lmgrd.exe, lmutil.exe, tidspssw.exe
For some reason it works like a charm now. Thanks a lot for your input !
Best regards,
Louis