Hi - I’m not the OP, but I wanted to reply to this thread because I’m having the same issue. I’m trying to use Agenda for work with a corporate Office 365 exchange account. My iPad is configured so that my calendar and email are synced with the native Calendar app. I can see all of my events in Agenda. When I link an exchange calendar event to a note the agenda://url is never added into the calendar app planner if the calendar event has any notes present.
If I create a local event on my ipad (synced with a personal Google account) the URL shows up everytime. If I create an exchange event and leave the notes/body empty the URL appears.
The problem is that nearly all of my exchange events has text in the body that becomes notes on iOS (call in numbers/reason for meeting, etc). Is there a way to fix this for my exchange events so the Agenda URL can populate or addend the notes somehow?