This quick step guide will show you how to add permissions for someone else to view and edit your Outlook calendar.
1. Firstly open Outlook and select the required calendar
2. Click on share calendar option in the top ribbon
3. On the permissions tab select Add
4. In the search field enter the email address/addresses for the users you want to share with, then select add and OK
5. In the permissions options below select “can edit” and click apply and OK