Write an automation rule that triggers automation then runs automation on children.

[Joe Mabus]

I want to write an automation rule that triggers automation then looks up children of that issue and runs the same automation on the children of that issue. 

I know I am way out on a limb here, but has anyone done something similar? Dealing with initiatives otherwise I would use script runner and its epic functions, but higher tranches of tickets don't have the same support. 

See the attached image for what I want the automation plan to be. 

[Trudy Claspill]

Hello @Joe Mabus 

This post recommends that you use Advanced Branching with a JQL statement to get the issues (instead of a Lookup Issues action) and then within the branch you can edit the field(s) in the found issues.

https://community.atlassian.com/t5/Jira-Software-questions/How-to-update-custom-field-of-issues-in-lookupIssues/qaq-p/1930040

(credit to @Daniel Alonso )