How to synchronize issues between different Jira sites?

[Jason Huang]

Hi,

We have 2 different Jira sites, and we want to synchronize the issues in a specific project on both Jira sites.

That's to say that when a ticket is created or updated in one of the Jira site, the other Jira site should also create or update the ticket.

I think the automation rule with web requests or incoming webhook can achieve this, but the assignee cannot be synchronized.

Below are my settings, could you please help achieve it? Thanks.

[Laurie Sciutti]

Hi @Jason Huang ~ is the assignee information (username and email) the same in both systems?  Does that assignee have the appropriate permissions in the target instance (i.e. can they be manually assigned issues in the target instance?