How to compute probability alive after t units

[saran-p]

"conditional_probability_alive" computes the probability that a customer with history (frequency, recency, T) is currently alive..

Is there a method to find the probability that a customer will be alive after t units? for e.g. probability that a customer will be alive after 5 years

I tried using Modified Beta Geo fitter. It predicts the probability that a customer is currently alive. Can the probability that a customer would be alive after 20 years be found?