We\'ve been using Google Apps for Edu in our University for some time now and we have multiple domain setups. There\'s a primary domain (uniben.edu e.g john.smith@uniben.edu) an
There is no built-in way to access users from another domain. I'm not certain if it would work, but you could potentially create a script in each domain that returned the users for that domain, and then include those scripts as a library in the master script.