Google has introduced multi-domain support in Google Apps. This comes in a new admin control that lets businesses and organizations with two or more domains on Google Apps manage them from a single control panel.
"Thousands of organizations deploy Google Apps every day, and a challenge for some large businesses has been migrating employees on multiple domains," says Google Apps software engineer Will Smit. "Until now, companies that ran into this issue could either set up other domains as domain aliases or set up different Google Apps accounts for each domain, neither of which was an ideal solution."
"Users belonging to different domains within an organization keep their domain-specific email address but can see coworkers from other domains in the organization’s global address book," says Smit. "It's also easy for users to share across domains in Google Docs, Sites and the rest of Google Apps."
The feature is available immediately for all Google Apps Premier and Education edition users. There is no additional cost.