Outlook calendar integration

Hi,

I'm a D365 Customer Service admin. In D365 there is a built-in module called Appointments. There is also an option where it syncs the created Appointments from D365 to user's outlook. So far so good. However, during the Appointment creation, D365 does only check for overlap or overbooking within the actual Appointment module and not the user's outlook calendar. In reality, we get meeting requests or even we use our outlook for other tasks as well. Here is my question or idea:

1. Is it possible to implement a plugin where upon the Appointment creation, it checks both sources (D365 and Outlook calendar) and if any overlapping item found to notify?
2. Or just a list, table or a calendar view where it shows all outlook calendar items so we can manually see them within D365?

Please let me know if you need more clarification.

Best,

Alex