Replies not showing up in request

Replies not showing up in request

If a technician replies to a requester from the ticket that conversation shows up in the ticket.  If a requester replies to the email sent from the ticket, the conversation doesn't show up in the ticket.  The technician doesn't receive an email saying there's a reply even though "E-mail technician when a request is appended by reply" enabled under Notificaiton Rules.  I found some posts saying the ##$RequestId## must be in the subject for ServiceDesk to update the ticket, and it is correct in all templates. 

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