This is how to share your work calendar with a private address (e.g. Gmail) to see appointments privately as well. Requirement: external calendar sharing is allowed in your organization.
New Outlook and Outlook on the web
Go to Calendar.
Right-click the calendar › Sharing and permissions.
Enter the private email address and choose the permission, e.g. Can view all details.
Click Share.
Outlook (classic)
Go to Calendar.
Choose Home › Share Calendar › select the calendar.
Click Add, enter the private address and choose the permission.
Confirm with OK.
Tip: The private address receives an email with a link. Use this link to add the calendar to the private account.
Note: If Outlook says sharing isn't allowed, external sharing is blocked. Please contact support.