Google announced today that all Google Apps admins can start taking advantage of some new features the company has introduced. These include delegated administration, multi-domain support and “fine-grained” user policy management.

Delegated administration was revealed in May. The feature essentially lets primary admins offer other users specific admin controls.

Multi-domain support was first announced in June as a new admin control that lets organizations with two or more domains on Google Apps to manage them from one control panel.

“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,” said Google Apps software engineer Will Smit. “It’s also easy for users to share across domains in Google Docs, Sites and the rest of Google Apps.”

In July, Google revealed its new user policy management letting admins segment their users into organizational units and control which apps are enabled or disabled for each group.

“These features have been well-received by the administrator community and we’ve seen healthy adoption among Google Apps for Business customers where these capabilities are helpful,” says Google Apps product manager Muzammil Esmail.

“Now all Google Apps administrators can use advanced control panel features to manage users and customize the security policies for their organizations, regardless of which version of Google Apps they’re using,” Esmail adds.

This week, Google also announced page-level permissions for Google Sites.