Is there a guideline for "separating the Atlassian "Organizations"? For a variety of reasons we need to separate part of an existing Organization due to the constraints/complexity of implementing SSO "Atlassian Access". Once separated, the new Organization will implement SSO. The current organization has not implemented SSO.
Considerations so far:
Welcome to the Community!
You have nailed a number of the things that need to be considered on the head. I have transferred a Jira Cloud instance from one organization to another and that part isn't very hard provided you are the Org Admin in both organizations.
I have seen other posted on the community about editing the XML Backup to modify various attributes before running an import, however I haven't personally done this so I can't speak to it's success. (Ref: https://community.atlassian.com/t5/Jira-questions/Jira-import-is-saying-You-must-enter-the-location-of-an-XML-file/qaq-p/926466)
As for splitting domains, I have never been a part of this type of activity, but I imagine this will be the most difficult task. But it can be accomplished as one of the other Community Leaders was capable of doing this: https://community.atlassian.com/t5/Jira-questions/Changing-domain-and-user-IDs/qaq-p/407620
You might want to reach out and ask for details in the thread.
I hope that helps!
Based on your valuable feedback, we have released several new features to help you gain administrative flexibility with authentication policies, visibility into shadow IT with automatic product disco...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events