Currently, users can't subscribe to the on-call schedule calendars in JSM operations. Previously, in the Opsgenie app, when you were in the calendar view and clicked open the calendar, a pop-up window with the Subscribe button opened in your calendar app.

This is reproducible on Data Center: (yes)

Steps to Reproduce

1. Log into yourjirasite.atlassian.net
2. Click on Teams
3. Select your operation team
4. Under operations, click on On-call and select your team's on-call schedule
5. Choose Calendar view
6. click on the ellipse or three dots for the option to subscribe to the calendar view. 

Expected Results

When you click on the three dots, there should be an option to subscribe to the on-call calendar.

Actual Results

There is no option to subscribe to the on-call calendar in the given option under three dots.

Workaround

Currently, there is no known workaround for this behavior.