ANSWER:
Before starting the connectivity troubleshooting, please check our official Network Service Status website for For Honor. Here you can see if your issues are being caused by maintenance, degradation or an outage.
If servers are up, but you are still having trouble connecting, the issue may be your internet connection. There are several factors that affect connection quality in our games. These play a huge role in how you experience the game. If you are connected via WiFi, you can maximise your gaming experience by connecting via an Ethernet cable instead.
For any NAT related issues, take a look at our guide on troubleshooting NAT issues.
Here is the list of steps you can try:
Start by testing your network connection. If the test shows that your connection is limited, try the following troubleshooting steps.
3. Enable UPnP
These are the ports you need for For Honor:
UDP: 1000, 1001, 6200, 6300
This should solve your issue. If not, make sure that the ports needed for Xbox Live are also opened. You can find information on Xbox One Network Ports on the Xbox FAQ page.
If you are still having trouble after trying these steps, please feel free to contact us.