WordPress Update Options Across WordPress Multisite Example of how to update thumbnail_crop across a WordPress Multisite.

Wordpress Multisite Update

<?php 
 define('WP_USE_THEMES', false);
 require('../wp-blog-header.php');
 require_once( ABSPATH . '/wp-includes/pluggable.php');

$setting = 'thumbnail_crop'; //the setting you want to update.
$newvalue = '1'; //the new value

echo "<h2>Member Sites</h2>";
$allsites = wp_get_sites('limit=0');
echo "<pre>";
foreach ($allsites as $value) {
    echo $value['domain'] . " - (blog_id: " . $value['blog_id'] . ") <br />";
    $currentsetting = get_blog_option( $value['blog_id'], $setting, false );
    echo "Current Setting: $currentsetting <br />";
    update_blog_option($value['blog_id'], $setting, $newvalue);
}
echo "<h2>Member Sites Details</h2>";
print_r($allsites);
echo "</pre>";
?>