Exchange Multiple Domain Provisioning

Hello EveryOne,

I have multiple domains in my envorinment and using FIM 2010 I need to create user's Exchange Mailbox into their respective domain basis some criteria e.g:

SomeName@xyc.com

SomeName@abc.com

SomeName@efg.com

Please Suggest.

Thanks 

Regards~
Deepak Arora
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