| Previous | Next |
| ERROR_DISK_CORRUPT | ERROR_LICENSE_QUOTA_EXCEEDED |
ERROR_NO_USER_SESSION_KEY
The authentication result has no UserSessionKey available for this session
User session keys appear in legacy Windows authentication protocol data, including Netlogon validation structures used for NTLM network logon. MS-NRPC defines UserSessionKey fields and protects them on the Netlogon secure channel; MS-NLMP derives SessionBaseKey material as part of NTLM authentication. This error means the caller asked for such key material but the specified logon/session path did not have it.
Identify the authentication protocol, logon level, and package before treating this as a generic key-storage failure. Kerberos, NTLM, anonymous, guest, local, and network logons do not expose identical session-key semantics to every caller. Capture the validation class and package-specific status. Do not confuse this key with the access token AuthenticationId LUID or with a DPAPI/user profile key. If a modern application only needs message protection, use SSPI context services instead of depending on legacy extraction of user session keys.
What to inspect
- Identify authentication package, protocol, and Netlogon logon/validation level.
- Distinguish protocol UserSessionKey material from token AuthenticationId and DPAPI keys.
- Prefer SSPI signing/sealing services over direct legacy session-key assumptions.
References
Looking for a different code? Search another status or error code.