Combine forums username database


Active member
I have two sites, both running xenforo. I didn't have the foresight to set them up to use the same username/passwords. Is there a way to combine them now?

Bottom line: Each site has 2,000+ registered users, and many visit both sites. I'd like it set up so a user only needs to be registered and signed in to one of the sites, and can seemlessly go to the other site.

I guess my biggest concern is if there are any duplicate usernames.

Any thoughts?

(If this is the wrong forum, please move, and accept my apologies.


XenForo moderator
Staff member
Single sign on and registration between separate installations would require an add-on.

I believe there have been already several requests for such an add-on.