add_action( 'pre_get_posts', 'sk_change_office_status_posts_per_page' );
/**
 * Change Posts Per Page for office-status taxonomy archives
 *
 * @author Bill Erickson
 * @link http://www.billerickson.net/customize-the-wordpress-query/
 * @param object $query data
 *
 */
function sk_change_office_status_posts_per_page( $query ) {

    if( $query->is_main_query() && !is_admin() && is_tax( 'office-status' ) ) {
        $query->set( 'posts_per_page', '5' );
    }

}