Atlassian Access is the SSO portal being used for SSO access across Jira, Confluence etc. for the configuration part see the following url: https://confluence.atlassian.com/cloud/saml-single-sign-on-943953302.html
For the configuration part of Workspace ONE Access just add a new manual SAML 2.0 application and provide the following information according to above article:
- Single Sign On URL https://auth.atlassian.com/login/callback?connection=saml”uniquesamlidprovided
- Recipient URL https://auth.atlassian.com/login/callback?connection=saml”uniquesamlidprovided
- Application ID https://auth.atlassian.com/saml/”uniqesamlidprovided
- Username Format = Unspecified
- Username Value = ${user.email}
- Relay State URL = https://id.atlassian.com/login
Add the custom attribute mappings for firstname, lastname and userprincipalname.