I already have Warcraft II on GOG. Can I still play online?

Warcraft I & II General Discussion
18

Check out this thread. It has some updated test info regarding port forwarding and muted issue in bnet lobby. As well as previously owned war2bne.
https://us.forums.blizzard.com/en/blizzard/t/warcraft-ii-battlenet-edition-cd-key-redeem/49334/2