If you have permissions to create/edit a calendar appointment, tap or click to open the calendar activity.
Web:
Once open, you will see a purple pencil icon in the upper right corner. Tap/click the purple pencil (edit).
The purple pencil will turn into a red trash can.
On Mobile:
Once open, you will see a purple pencil icon in the upper right corner. Tap/click the purple pencil (edit).
The purple pencil will turn into a red trash can.
A confirmation dialogue box will appear as a dual-verification for deletion.