Feasibly, this should work. I heard it was in and it isn't. I have a very strict deal against adding anyone and everyone on Steam, and I was given word that using /join or /invite should work for composing fireteams as long as I knew someone's Steam profile ID. Is there anything I'm doing wrong, or is it simply not implemented yet? EDIT: Adding more information So, as far as I know, we use the SteamID64 to enter fireteams. I do that. I get an error about Invalid Steam IDs. Okay. Those are the ones that usually look like 7612345678901234. I try entering the one used as the CustomURL for the profile. It seems to work, but it also times out and says something about Bungie's servers. I am also unable to be invited. I did not understand why.