For reference, we have  Process emails received from new email addresses ?  set to no.

Today, we have a new user who was set up with one email address in SDP (and is used to match the big Active Directory we authorize against), but sends their email through an alternate address (i.e. user@domain.com vs user@exchange.domain.com).  I added the 2nd email address as a secondary email in the requester's attribute, but replies from the user still don't appear in SDP correctly.

Is there any scenario where we can make this work?