New profile added in MS Outlook to exisiting user for one workstation.
New Mailbox set up in Exchange server to existing user.
New Domain registered and hosted--propigated--everything seems in order here. (hopefully)
Old domain name emails come in from outside to new mailbox just fine.
New domain emails sent from outside to us are returned unknown user. Emails to existing mailboxes and new mailbox tested and both emails are returned. (emails set up in both old mailbox and new mailbox)
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