Issue

In Automation For Jira, there is currently no action allowing to sync fields/comments/status updates between Jira issues.

Such action could be useful in use cases like the one described below:

I have my "Main" Jira ticket, lets called her A-1
A has 2 linked Jira's for a different project (B-1, C-1)
I want to make a rule which syncs automatically data from issue A to issue B and issue C and also in the other way.

For example:

• if user1 comment in A - this comment should appear also in B&C Jira's tickets
• if user2 comment in B - this comment should appear also in A Jira's ticket
• if user1 updates a field in A, this field should be updated in B&C, etc...

Suggestion

Create some action that will 'copy all changes' to linked issues, which could work like this:

• Trigger: Issue changed (workflow transitions, field updates, comment, etc)
• Related issues with linked
• Action: Copy all changes from trigger issue (workflow transitions, field updates, comments ...)

Workaround

Implement the automation rules described in the KB article linked below, which will help syncing some data between Jira issues (specific fields and comments):
https://confluence.atlassian.com/automationkb/automation-for-jira-writing-a-rule-that-syncs-fields-and-comments-1236601774.html