Translate from netbios format name (domain\sAMAccountName) to LDAP distinguishedName: How?

[surendar...@rubrik.com]

Not specific to LDAP, how do you translate from NetBios format user name into DN using LDAP commands against Active Directory? The second component is sAMAccountName which can be filtered but how to do find the netbios name. In my case, I went from example.com to a user in hr.example.com (and it shows up as hr\user). Thanks much