multisite

Point the subdomain to the same directory as the main site, and define different settings in your wp-config.php per $_SERVER[‘HTTP_HOST’]: Example from my local setup: switch ( $_SERVER[‘HTTP_HOST’] ) { case ‘zzl.dev’: $table_prefix = ‘zzl_’; $table_name=”zzl”; break; case ‘wpbuch.dev’: $table_prefix = ‘wpbuch_’; $table_name=”wpbuch”; break; default: $table_prefix = ‘wp_’; $table_name=”wpdev”; break; } $sub = ‘/wp-content/’ . … Read more

First, reasons for not using Multisite. And reasons to use it. My guess is that you don’t need it, and that all can be contained inside a single WordPress. Each Department would have a Custom Post Type. And the Organization keeps the default Post post type. All of them share the same categories (news, events, … Read more