D365 & Zendesk - RAPID POC

Zendesk tickets > D365 Customer Service D365 Appointments > Zendesk Each item only a one way sync. Zendesk ticket > D365 record - As a user when I create/update a ticket in Zendesk I want a corresponding record created/updated in D365 D365 record created -As a user I want Zendesk activities to appear in the D365 user timeline - system matched to contact based on email address - Zendesk customer ID captured D365 appt > Zendesk appt - As a user when I create/update an appointment in D365 CS I want a corresponding record created/updated in Zendesk - Appointment created in D365 for contact with Zendesk ID - Appt sync'd to Zendesk attached to customer CRUD on appointments are made in D365 only. CRUD on tickets are made in Zendesk only. I will supply the trial Zendesk & D365 env's to which the solution must be deployed I am happy for this POC functionalitly to be delivered via an agreed middleware. The code source must be available for review. Very basic integration [login to view URL] be worked on over this weekend To be delivered ahead of 10 Monday 25 April (powerapp, popdock, zapier, middleware,)