Outlook - Sharing access to a calendar
Open Outlook Calendars
Right click the calendar you want to share then click Properties
In the new window which will open click Permissions tab
Click Add and search for the person you want to share with
Click Ok
Then click on the Permission Level drop down and select the type of permissions you want the person to have
Click Apply and the other person should be able to add the calendar in their own Outlook https://svimrit.atlassian.net/l/cp/Qr1qK8S8