Atlas S8+, connecting to an OD domain.
The Atlas S8+ domain page lists only LDAP and AD domains.
While Apple's Open Directory is not listed, OD is in fact a variant of LDAP. It is possible to connect to the OD server as an LDAP client.
Generally OD should work without error, but there is one caveat, if some users show up with the username Array
This means that these OD users have user aliases, the solution is delete the alias for affected users.