To aid migration of user accounts to the LDAP server, the configuration parameter enable ldap user auth provides a setting that allows authentication through either the LDAP server or syslogins.
When enable ldap user auth is 1, Adaptive Server first searches the LDAP server to authenticate a user. If that search fails, Adaptive Server searches syslogins. Thus, all users have access to Adaptive Server during the migration process—whether their accounts are currently on LDAP server or syslogins.
See “enable ldap user auth” for syntax and usage information..