how to determine the opened outlook appointment item by user is an occurrence, exception or master series in compose mode through Office.js?
<p>In the context of calendar recurrence event(appointment) in compose mode through Office.js I need to set custom properties to the respective appointment  master series item either the opened event by user is an occurrence, exception or master series.</p>

<p>Here's the problem I am facing through office.js API is, I'm not able to identify the opened appointment by user is an occurrence, exception or master series. How can I identify it? If it's an occurrence or exception then how can I add custom property to the respective master series item from current item context through the Office.js.</p>