You need to add two years to an existing period schedule.

The Generate Period Schedule Periods task extends an existing period schedule by automatically creating future periods. Workday states that this task can extend supported period schedules for up to two years. The schedule must already contain at least one configured period so Workday can derive the sequence, frequency, period boundaries, and related dates for the newly generated periods.

This task is appropriate because the requirement is to extend an existing schedule, not establish a new schedule. Create Period Schedule is used when manually defining a new period schedule. “Set Up Period Schedule” and “Produce Period Schedule Periods” are not the delivered tasks for this operation.

For supported frequencies—including annual, weekly, biweekly, semimonthly, and monthly—the administrator selects the existing schedule and specifies the number of periods to generate. Workday then derives the period start and end dates based on the existing schedule pattern. Depending on the schedule’s usage, the administrator may also need to review application-specific dates or overrides after generation.