I'm facing a problem while migrating from Exchange 2003 organization to Exchange 2007.

we have some users with specific primary smtp in old organization that was changed , by email address policy,.

My need is to export the primary smtp address fromthe oExchange 2003 organization in import it to exchange 2007 .

the idea is to use export CSV file with alias and primary smtp from 2003 and import.in exchange 2007 and disable the policy for these users.

Please help.