Thread:Project:Support desk/Sidebar editing doesn't work like described in 1.20.3/reply (2)

The /mywiki/index.php/MediaWiki:Sidebar URL will largely depend on your URL configuration. The page you need to edit is MediaWiki:Sidebar. You can reach it putting that link on a page on your wiki, hitting preview and following the link, or putting "MediaWiki:Sidebar" on the search field and submitting the search form.