Thread:Project:Support desk/change a user's username/reply

Hi there! You need to install an extension, Extension:RenameUser which does not come standard as part of MediaWiki. On the Wikimedia project sites we have a 'bureaucrat' user right that would allow a user to rename another user account, but if you add the renameusers permission to a user group through LocalSettings.php then that user group would be able to rename users. Hope this helps!