Finally it's working ! I just opened 2 ports on my router...

Hi Noémi, many many thanks for your answer ! I'm waiting for a call from the resaler of Archicad in France witch will help me the way you explain !Best regards.

Hello, I have exactly the reverse problem !I'm on an iMacPro (witch is hosting the serveur and manager), I'm working also on this computer using Archicad to access the server (everything is working fine). I have a second laptop (PC) accessing the server from the LAN Network ...