Resolution: To share your calendar in Outlook (Classic), Follow the steps below.
Go to the Calendar icon on the left side of the screen:

Towards the middle of the screen locate and click the Share Calendar icon:

Under your email account click on the calendar icon:

Click the "Add"button and type in the person you would like to share your Calendar with:


Once the person is added you can change their permissions accordingly and select "Apply":

Permissions and what they do:
- Can view when I'm busy - Allows others to see your availability (free/busy status) on your calendar, without any event details.
- Can view titles and locations - In addition to seeing your availability, others can view the titles and locations of your meetings.
- Can view all details - Grants access to full event information, including descriptions, attendees, and all details mentioned above.
- Can Edit - Allows others to modify your calendar events. This includes changing times, titles, locations, and other details, along with all previous permissions.
- Delegate - Provides full control over your calendar. Delegates can create, modify, and delete events on your behalf, in addition to having all the permissions listed above.