Grant partial/selected access.
- Open Outlook.
- Click on Calendar
.
- On the top bar menu, click on Share Calendar.
- Click on the To field and then select the user you wish to be able to view your selected folder and then click on OK.
- Click on Send
- Click on Yes when the Permissions window pops up
Note:Once you have granted this access, the other party will need to open your shared resource in their Outlook. Please refer to this Knowledgebase Article: How do I open another person's Calendar or other folders in Outlook 2010?