In addition to logging in (authentication), you must also provide Viya with a list of users (identity provisioning).
Your authentication provider can be an LDAP server, OIDC, SAML or Kerberos.
Your identity provider can either be LDAP or SCIM.
The account identifier must match between your authentication and identity providers exactly.
The error message saying the system could not obtain group memberships means authentication was successful, but when SAS Logon Manager called the identities service to request the groups the authenticated user is a member of, this request failed, suggesting identity provisioning has not been configured.
The identities service also providers uid/gid numbers to allow users to run compute sessions.
This documentation goes into more detail on Identity Management:
https://go.documentation.sas.com/doc/en/sasadmincdc/v_057/calids/titlepage.htm
--
Greg Wootton | Principal Systems Technical Support Engineer