(SOLVED) SAML (ADFS) Issue: An account with that username already exists

Troubleshooting
2

Thanks @Schuby for the report,

  1. When the existing user switched to the SSO sign-in under Account Settings:
    a) were they redirected to the sign in page (sounds like they were)
    b) did they receive an email titled “You updated your sign-in method on [server name]”

  2. Can you help go to System Console > Teams and

  • click on the “+” icon next to “TEAMS” on left-hand sidebar
  • in the “Select Team” modal, choose the team users who are having login issues belong to
  • go to the “Users” section of the team you just chose on the left-hand sidebar
  • search for the user(s) and check what their “Sign-in Method” is on the page

  1. and 2) is to confirm their sign-in method was changed successfully.

Hopefully we can get this resolved for you quickly.