Reply To: Forum URL
I should say that I am not the plugin author, just an experienced user.
bbpress just uses wordpress custom posts, so in most cases having the forums within the main site would be no problem. Of course I don’t know your site, so cannot recommend, but most sites just have it within. If the main site is down, chances are that most will not access the forums directly, but rather via the main site, so the forums would ‘appear’ to be down as well.
It is an option to uncheck the box, it is not a recommendation (the box I quoted in settings recommends that you do display the prefix, but I think this is just for clarity in the url).
unticking the box would achieve https://forums.X.com/ and putting the forums in your main site would achieve https://X.com/forums/
