Can users Register only once for many forums ?

[cubado]

I have used the search function to no avail.

For example when registering you can have the option to register to one forum or many the by checking a box?

Seems simple.

 

[jeb35]

You can't register once on one website and access forum on a different website. You have to register at each website.

 

[cubado]

It seems like it would be something useful . For me anyway & my users.

How hard would it be to create this add on?

 

[Matthew S]

It seems like it would be something useful . For me anyway & my users.

How hard would it be to create this add on?

An addon already exists: https://xenforo.com/community/resources/xencentral-multisite-system-2.6966/

Keep in mind you need a separate Xenforo license for every domain.