unusual LDAP distinguishedName format

encountered an unusual format for an active directory LDAP result, in a log created at a customer site - when LDAP querying active directory from a C#(.Net开发者_StackOverflow社区) app. instead of strings in the usual format: "cn=group1,ou=someOU,dc=company,dc=com", getting "cn=group1 ou=someOU dc=company dc=com" (no commas!) googled till my fingers burn but can't find an explanation so far. can anyone explain this?

it's very unlikely that the server returns such broken DNs. most likely that the software transforms it on the way to log file.