Multisite Maintenance allows manage multisites updates. It helps administrators to to perform batch maintenance on multisite installations. The module can take selected sites off-line and then back on again. It can also run update.php on selected sites.

How to install the module

1. Enable multisite_api and multisite_maintenance modules at admin/build/modules (You only need to do this on one of the sites in your multisite)
2. Give the ‘perform maintenance on multisites’ permission at admin/user/access
It should go without saying that this is a very powerful module and its use should be
restricted to users that have a strong understanding of Drupal multisite setup
3. You can find some additional info at:

• admin/multisite/multisite_setup
• admin/multisite/multisite_setup/status
• admin/multisite/multisite_setup/update

This module is merely a “proof-of-concept” and not for the faint of heart. It goes without saying that you use this at your own risk. Only you are liable if this breaks all your sites. If this makes you feel uncomfortable, consider examining the code to see how this actually works.

This module is looking for a new maintainer. There are better tools to do this (i.e. Drush). Furthermore the idea of a graphical tool to perform updates on multiple sites is not currently possible to do “the right way” without some serious patches to update.php.

You can learn more about the module on its official page: http://drupal.org/project/multisite_maintenance