Deleting multiple Activities

To delete multiple activities:

Select all the required activities you want to delete on the Activities list view and in the Task Pane under Common Tasks section click Delete Activity, or right-click in the grid, and then select Delete Activity.

Note: If you select multiple activities and any are recurring, then only the selected occurrence or occurrences of the recurring activity to be deleted.
Click OK to permanently delete the record, or Cancel to cancel deletion of the record.