Everything is up to date, both, uplay (the crew/far cry and so on), steam (rise of nations)
Both on win 10, both fully upgraded
We are 4 guys that play together, i can connect with the 2 others, no problem, but he cant join once I'm in a group with either of the two or both, and he can join the two others individually or together, no problem but then i cant get in the group. I can see other online players and join teams.. so all the games work in multiplayer (witch makes me believe the right port are open)
I have tried to disconnect the Ethernet cable and using my phone and using 4g via USB to the pc, my phone is on another provider with the same result.
In GTA 5 we can join each other no problem at all
We all play online, we are 30+ kilometers apart each member of that group
Sorry i did not specify further but i really don't know where to look or what to do, so i will try to answer everything in order to find the problem
A little more detail may shed some light on the issue:
UPlay up to date?
Games up to date?
Operating Systems and are they up to date?
Are you in the same locale?
Do you both have the necessary ports open on your routers for UPlay MP? (this would be my first guess at the problem).