For an employee to see another employee’s calendar the person sharing the calendar must set up permissions on his/her calendar. Then the person viewing the calendar must configure his/her Outlook to view the other employee’s calendar.
To share your calendar:
1. View your calendar, and on the Navigation Pane, under the Calendar folder, click Share My Calendar.
2. Next, add the name of the person you want to share with, and set permissions. Permission levels that you would be likely to use for calendar sharing include:
Reviewer—Can read calendar entries but cannot create, modify, or delete them.
Author—Can read or create calendar entries, and can modify or delete only entries that the author has created.
Editor—Can read, create, modify, or delete all calendar entries, whether or not the editor has created them.
To view another person’s calendar:
When viewing your calendar, you'll see a link in that pane called Open a Shared Calendar. To open the shared calendar, you would click this link, click the Name button, and select or type the name for the person sharing with you. Right away, you'll see the name listed under Other Calendars.