Additional domains FAQ
Help me understandWhat is multiple domain support?
If you own multiple Internet domains, you can associate them all with your organization's Google account at no extra cost. Depending on how you add the domain, users can have an identity at one or more domain. They can share Google services. And you manage them from the same Google Admin console. To get started, see Managing all your domains.
The legacy free edition of Google Apps supports domain aliases but not secondary domains.
A domain alias is a domain name that can be used as an alternate name for another domain. When used with a Google services account, domain aliases can either give users an email address at another domain. Or they can be used to set up dual email delivery, for example, if you want to test drive Gmail against your legacy mail program.
As with any other domain you use with Google services, you must own the domain name and verify your ownership.
A whitelisted domain is an external trusted domain that you add in your Domain settings to allow users in your organization to share files with users in that trusted domain. Your users can also receive files from users of the trusted domain.
After you whitelist a trusted domain, users can invite people from that domain to view, comment on, and edit their files. A warning message is turned on by default that asks users to confirm before they share files with a whitelisted domain.
For details, see Whitelist trusted domains for Google Apps.
To give all users in your domain an alternate email address at another domain, add the domain as a domain alias. Adding the domain alias.com as an alias to example.com, gives email@example.com another email address at firstname.lastname@example.org. Learn more about adding a domain alias
If the domain you're adding instead has its own set of users, add it as a separate domain. Users can have email addresses and Google accounts at their respective domain. And they can collaborate internally using your Google services. Learn more about adding a separate domain
There is no relationship. Domains and organizational units are just two different ways to organize your users. You add users to a domain to give them a common email address and account name. You add them to organizational units to give them access to different features and services. An organizational unit can include users from different domains and vice versa. For example, you might have a Marketing unit containing users from two domains. Learn more about organizational units.
How it worksHow do I add domains to my organization's Google account?
When you sign up for Google Apps, you provide a domain name that becomes the primary domain associated with your Google account. After that, you can add your other domains using your Google Admin console. You add the domain as either a separate domain or domain alias. In either case, you must own the domain name and verify your ownership. For instructions, see Add a domain or domain alias.
You can add up to 599 non-primary domains to your organization's Google account. You can also add up to 20 domain aliases to your primary domain.
Yes. As long as the SSO system is configured to identify the user by email address, it works smoothly for Google accounts with multiple domains. (Learn more about SSO.)
Not at this time. Instead, we recommend that you choose the account that has the domain you want to use as your primary domain. Then remove the domains from your other accounts and add them to this one account. For details, see Merge domains from separate accounts.
Not directly. Instead, you must remove the domain alias from your account, then add the same domain back as a new secondary domain. You can then swap the secondary domain with your primary domain. For details, see Change your primary domain.
Your Google Admin console doesn't have separate configuration settings for each of your domains. But you can tailor settings for a domain's users by placing the users in their own organizational unit, then applying settings to that unit. For details, see About user and device policies.
Yes, you can change the name of your primary domain by swapping it with one of your secondary domains, using the Customers API. If you wish to use a newly-acquired domain, it must be added to your account as a secondary domain first.