We use Office 365 and I was trying to use the Calendar Passer Client and had a lot of issues.
The first problem is that the AutoDiscovery was not working correctly for me. When I started the client it would hang for at lease 3 minutes. I finally figured out it was the AutoDiscovery that was taking all the time.
The second problem that I had was that I could not authenticate. The code does an OAuth token authenticate. The problem for me was that the "CalendarPasserClient" needed to be registered with Azure AD for the OAuth to work. I needed to go to my Azure AD portal and add the application manually. Here the information that you will need for registering the "CalendarPasserClient" with Azure AD.
Application Id: ed0badb4-aa5e-40b2-814b-18a5086743f3
Hope this helps someone else.
Thank you for your input. It is highly appreciated.
Hopefully, other Community members will find this information useful if encountering this issue.
Intel Customer Support Technician
A Contingent Worker at Intel