I'm currently debating using XenForo for an upcoming project of mine and am trying to understand all the details of it before jumping right in. Mind you, the licensing is not expensive and for the quality of software it appears to be, it is very affordable.
That being said, I'm curious about the Facebook integration. The particular project I will be working on already has a fairly large community with Facebook so it makes sense to bake that integration in from the start. The thing I was curious about, is there a way to automatically have users who use Facebook to auth their forum accounts like the community page? If so, is that a functionality XenForo has prewritten or would I have to go about writing that on my own?