I recently wanted to create a shared calendar with my wife. Since I have been using Outlook.com for a long time, I have decided to create a new one for my wife. Also it will be very easy to share calendar between two accounts which are both on same platform. Then I have created a new calendar and share it with my wife’s email id and give her permission to add, modify and delete events on that calendar. A new email has been sent to her email to accept the calendar invitation. After accepting it now we have a full working calendar shared between us. I can see this calendar to my Outlook on Windows as well as on Android.
I have added this shared calendar to my echo dot. Now we can both manage the shared calendar from Alexa like a family calendar.