DNWithOctetString is found in the schema for the regarding attribute. This OID is described in the Microsoft Active Directory Technical Specification MSADTS. 2.5.5.7 corresponds with the 1.2.840.113556.1.4.903 syntax.[2]
2.5.5.7 is also used with the OR-Name and is the ADsType ADSTYPE_CASE_IGNORE_STRING
OR-Name is found in the schema for the regarding attribute. This OID is described in the Microsoft Active Directory Technical Specification MSADTS. 2.5.5.7 corresponds with the 1.2.840.113556.1.4.1221 syntax.[2]
2.5.5.7 is, as far as LDAPWiki can determine, exclusively used in Microsoft Active Directory.