Problems with legacyExchangeDN addresses during migration

Hi all

Im performing an interorg Exchange 2003 to Exchange 2003 migration.

I've created contacts of all mail enabled users of the source org in the destination org.
At first I created them in a bad way (without assinging the legacyExchangeDN correctly) and i've fixed it.

But now, when migrated users send any mail, some recipients return an NDR because the user "does not exist on the organization". The problem is that the recipient legacyExchangeDN address that appears on the error is: /O=SERVER/OU=FIRST ADMINISTRATIVE GROUP/CN=RECIPIENTS/CN=Name Surname1 Surname2;
instead of
/O=SERVER/OU=FIRST ADMINISTRATIVE GROUP/CN=RECIPIENTS/CN=mailnickname;

I think this is consequence of the bad initial creation of the contacts.

How can i fix the problem???
THX ALLStart Free Trial