Customer accounts: Support SSO via other methods and identity providers(IdP) e.g. SSO via JWT

Problem Definition

• Currently we are only providing SSO via SAML
• There is a domain verification process where the domain admin needs to update the DNS records or host a verification file on the root directory of their website
• This isn't usually possible/viable when supporting users on external domains(domains owned by other people)
• Therefore SSO is not possible to use IdPs such as Azure B2C in Jira Service Desk

Suggested Solution

• Allow for an SSO solution that is compatible with IdPs such as Azure B2C
• Allow additional SSO options, e.g. SSO via JWT

Why this is important

• Offer more flexibility regarding customer account sign-in options

Workaround

• No known workarounds
• As per Ash Young's message on JSDCLOUD-630:

  Quick update to let you know we've release JSM external customer (Portal-only account) SSO for everyone.

  https://community.atlassian.com/t5/Jira-Service-Management-articles/JSM-Portal-only-account-Single-Sign-On-SSO-Now-Available/ba-p/2442381

  External customer SSO on the JSM portal is now supported via SAML