Apply Retention - under subclinet properties all multiple systems

Hi,

I would like to know how to apply the below to more than 500 systems in one go.

change the “Default Sub Client Policy” - “Retention” - “For files deleted by user”  change from “Retain indefinitely” to “Use storage policy copy retention”.

Cannot certainly do it manually so looking for an option to save my day and time..

Regards,

Terence