Many organizations own multiple Internet domains. The domains
might represent distinct business units, brands, or geographies.
For example, Google owns the domain names google.com,
adwords.com, youtube.com, google.co.uk, and google.de (among
many others). Similarly, a state university system might have
separate .edu domains for each campus. Users with accounts on
any of these domains need access to the same Google Apps, and
they need to be able to work with users in other domains that
are part of the larger organization. You can associate multiple
Internet domains with your Google Apps account, as long as you
own the domain names. Each domain remains an independent entity,
but Google Apps recognizes that the domains are part of a single
organization. For example, each domain has its own set of user
accounts, but users can share calendars or documents with users
in any domain that is part of the organization. Gmail treats
mail between users in different domains as if it were
intradomain traffic. You manage all