PST import - Problem when replying to old e-mail

Hi,

When using New-MailboxImportRequest to import PST files to Exchange 2013 CU2 we end up with a succesful import. When the end-user tries to reply to an old e-mail the "To" field is just populated with the Display Name of the user that sent the mail. Not the smtp or X500 address. See the attached picture.

If we use Outlook to import the issue does not occurs.

We have tried with different versions of Exchange as source mailsystem and different versions of Outlook as export tool with the same result.

Is this a known issue?

Best regards, Jesper