Google Apps administrators now have the ability to create nicknames for Google Groups. If your Google Apps account includes more than one domain, you can add a nickname that has a different domain from the original group. Note that this can only be done in the administrator control panel.

Languages supported:
All languages

Editions included:
Google Apps for Business, Government and Education

For more information:
http://support.google.com/a/bin/answer.py?hl=en&answer=2727156

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