Canceling a recurring activity will affect only occurrences with the start date in the future, except ones with time logs.
Deleting the occurrences of a recurring activity:
- In Activity Center, hover over the recurring activity you would like to delete OR any of its occurrences.
- Click the More actions button ( )
- Select Repeat on the dropdown menu.
- Toggle off Recurrence is on to turn recurrence off.
- You will be warned that only future occurrences (with the start date in the future) will be deleted, except ones that have time logs.
- Click Delete.
The original activity is NOT deleted nor is the parent recurring activity.