Hi, I need help with Zoho Flow → Acuity Scheduling integration.

What I’m doing

1. Appointment created in Acuity
   
   

2. Zoho Flow creates a Zoho Calendar event
   
   

3. I want to send the Zoho Calendar Event UID back into Acuity (into a custom form field)
   
   

This is so that when the appointment is rescheduled later, Zoho Flow can update the correct Zoho Calendar event.

The problem

Zoho Flow has no “Update Appointment” action.
So I tried using Reschedule Appointment only to update the field.

But Acuity returns this error:

Clients are not allowed to reschedule this close to the time of the appointment

Acuity API says this can be bypassed by using:

admin=true

What I need to know

1. Can Zoho Flow add admin=true to the reschedule request?
   
   

2. Is there any way to update Acuity form fields from Zoho Flow without rescheduling?
   
   

3. If not, should I use Invoke URL to call Acuity API manually?
   
   

My only goal:
Write the Zoho Calendar Event UID into Acuity after creating the calendar event. No rescheduling. No time change.

Thanks for any suggestions!