If you are part of a shared Outlook calendar, it can be frustrating to try and keep up with changes to that calendar that you didn’t make. Now, using the web-based Outlook calendar, you can access a new setting that will allow you to receive notifications as changes are made to that shared calendar. Here’s how to set that up…
Using the web-based Outlook calendar (https://outlook.office.com/calendar), go to Settings and select Calendar > Shared calendars. You will see any shared calendars where you have permissions to view and/or update content. To receive notifications for those calendar changes in your inbox, select the checkbox next to the calendar:

This is a great feature for people who are responsible for managing someone’s calendar, but they may not be the only person making changes to that calendar. Again, this setting is only available in the browser-based version of Outlook, so you’ll need to use that version of Outlook to set this feature.
For more information, check out Outlook: Shared Calendar Notifications.