1. Verify integrity of cache on For Honor from Steam, first
2. If everything is fine, try flushing your DNS (Command Prompt -> ipconfig /flushdns) to make sure there's no useless stored stuff blocking your communication with the servers
3. Look over your firewall for any blocked activity from both applications, close any other programs or apps that can affect your local network
4. Make sure your NAT is green and that For Honor/Uplay's ports are forwarded
Internet Connection Sharing (ICS) could also affect the game, turn it off if it isn't already.
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