How to create a shared calendar on Outlook:
Step 1. Select the calendar option in the left bottom part of Outlook.
Step 2. Go to Add Calendar.
Step 3. Click on Create a new Blank calendar.
Step 4. Input a name for your calendar (in my example it will be Pathway_Test). Then, click OK.
Step 5. Select the calendar on the left side (under My Calendars).
Step 6. You will be able to see the calendar.
Step 7. You can mark some appointments like a business trip, vacation, a day off, etc, normally, for example:
Step 8. To share this calendar, select Share Calendar and then, the calendar recently created.
Step 9. You will see this screen.
Step 10. Click on Add...
Step 11. Select the users who you want to share the calendar. And click on OK.
Step 12. You can choose what permission the users could be on the calendar. In this case, I put Can edit. And click on OK.
Step 13. The people you choose will receive an e-mail and they will be able to see the created calendar.