Windows error 8256 (ERROR_DS_NOT_SUPPORTED): meaning and diagnosis

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: The directory server does not support the LDAP method, control, or operation requested by the client.

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ERROR_DS_PARAM_ERROR	ERROR_DS_NO_RESULTS_RETURNED

ERROR_DS_NOT_SUPPORTED

ERROR_DS_NOT_SUPPORTED (0x00002040) is an Active Directory Domain Services LDAP result. The directory server does not support the LDAP method, control, or operation requested by the client.

What to check

Check the RootDSE capabilities and the target server version before using optional LDAP features.
Verify that the request is sent to AD DS rather than an endpoint with different LDAP feature support.
Use a supported alternative rather than assuming the server will ignore an unsupported request.

Useful command

Get-ADRootDSE -Server "<dc-fqdn>" | Select-Object supportedControl,supportedExtension,supportedLDAPVersion

Microsoft: AD DS LDAP operations · Microsoft: LDAP ETW tracing · Microsoft: AD DS diagnostic logging

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