The problem is the software provided to be able to monitor multiple camera .... impossible to make it work properly, after several failed attempts on 4 different computers, I take contact with the VAS Foscam, no solution is found and finally the tech propose to try the app paying Blueiris .... it works fine.
In the end, Foscam offered me a 50% discount on Blueiris, it's nice but why provide free app that does not work properly?