Doubt regarding the series Do Forecast

Hi,

I have a doubt regarding the matrix series Do Forecast.

As per the characteristic of a matrix series, the value of this series depend on item-location combination only and not on time.

Now, if I want the engine to generate forecast for a combination for 6 months only starting from the next month and max_fore_sales_date is 2 years from now (i.e. the forecast time horizon is 2 years), how can I set this series to 'Do Forecast' for the next 6 months and 'Do Zero Forecast' for the rest of the forecast horizon? Is it at all possible?

Thanks,