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ERROR_DS_PARAM_ERROR
ERROR_DS_PARAM_ERROR (0x0000203F) is an Active Directory Domain Services LDAP result. One or more LDAP operation parameters are invalid for the request the client sent.
Log every LDAP operation parameter after wrapper conversion, especially DNs, controls, page settings, and flags. Compare the failing request with a known valid call so the invalid field is corrected rather than hidden by repeated retries.
What to check
- Capture the exact LDAP operation, controls, search scope, base DN, and attribute list.
- Validate each parameter against the operation type instead of changing multiple values at once.
- Reproduce the request with a minimal supported set of parameters to identify the invalid field.
Useful command
Get-ADRootDSE -Server "<dc-fqdn>"Microsoft: AD DS LDAP operations · Microsoft: LDAP ETW tracing · Microsoft: AD DS diagnostic logging
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