In Active Directory Users and Computers (ADUC), I right-click the user and go to Exchange Tasks, looking for "Create Mailbox," but all I get is "Remove Exchange Attributes." How do I create a mailbox for User? This is for Exchange Server 2003.
It sounds like your Recipient Update Service (RUS) has not stamped the accounts you're working with. You'll need to right-click and select "Remove Exchange Attributes." Wait a bit, and then right-click and select "Create Mailbox."
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