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ERROR_DS_INAPPROPRIATE_AUTH
ERROR_DS_INAPPROPRIATE_AUTH (0x00002029) is an Active Directory Domain Services LDAP result. The authentication request is not appropriate for the requested LDAP operation or server state.
Compare the bind state, requested operation, and server security requirements at the time of failure. A credential can be valid while the chosen authentication context is inappropriate for an operation that needs stronger or different authorization.
What to check
- Check the bind identity, authentication mechanism, target DC, and whether the request uses LDAP or LDAPS.
- Verify that the client is not using an anonymous or simple bind where the server requires a different method.
- Capture the server diagnostic message because it often identifies the rejected authentication condition.
Useful command
Test-NetConnection "<dc-fqdn>" -Port 389Microsoft: LDAP signing · Microsoft: Troubleshoot LDAPS · Microsoft: AD DS LDAP operations
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