Query regarding default sorting in Users Listing menu

Edit components/com_cjforum/models/users.php and change

parent::populateState('posts', 'DESC');

to 

parent::populateState('a.name', 'ASC');

If I change the code, then it will get updated when you release the next version. Is there any other way? Is there an override method or a configuration option? Or something in the menu query string?

There is no other option as of now. Please post a feature request at https://www.corejoomla.com/suggest-an-idea.html so that it can be considered for future releases.

Done. Put it up on the feature request topic.