Select Calendar > Share Calendar. Choose a calendar to share. Select Add, decide who to share your calendar with, and select Add. Select OK and you'll see the added people with a default permission level. Choose a name, select the access level to give, and select OK.

Select Calendar > Share Calendar. Choose the calendar you’d like to share. Press Add and choose a recipient. Select Ok and add recipients with default permission access. To change their permission access, choose a name, update the access level, and select Ok.

In your calendar, select Share. Choose the calendar you want to share from the drop-down menu. In the Calendar Properties dialog box, click Add. You can search for people from your address book or type in their email addresses in the Add box. When you're done adding names in the Add Users dialog box, select OK.

Select Share. Choose the calendar you want to share. Enter the email address or contact name. For people Inside your organization, choose how much access to allow. Select Share.