SAML SSO documentation is not updated about how to set up JIRA Service Desk Customer using SSO

How to set up JIRA Service Desk customer account login with SSO

1. For existing customer account , search the user in Portal Only Customer list by go to User Management > JIRA Service Desk > Portal only Customer
2. Open the user profile and click Migrate to Atlassian Account
3. Then , it will redirect to user profile with that have the application access/group information. Make sure to remove all the application access because Customer account don't require an application access and it will not counted in any license.
4. Now , open the Customer Portal and key in the email. If the email already in the Organization managed account , it will be redirected to SSO.