when you receive an email and it s wrong resolve because of human or computer you need to correct it. For that i set the email activity in draft with dynamics power pane (chrome extention) and after I apply this in PATCH mode with postMan { "statuscode":4, "statecode":1, "email_activity_parties" : [ { "partyid_lead@odata.bind" : "/leads(87701058-3C67-E911-80E7-005056B22A06)", "participationtypemask" : 1 }, { "partyid_queue@odata.bind" : "/queues(7A5AC7BE-BE0C-E411-8890-AC162DAC65CC)", "participationtypemask" : 2 } ] }