0x8009030C. — Logon-N/Sort.
Domain: Windows & AuthenticationPriority: High
What does this error mean?
SSPI refuses the authentication with the available information.
Probable causes
- password.
- SPN
- Kerberos/NTLM.
Verification and resolution
- Check account.
- Control SPN.
- Correlate with Kerberos events.
Precaution: The problem can be identity rather than network.
← Return to the basis of the codes of error
Quick diagnostic.
To diagnose code 0x8009030C in Windows domain. & Authentication, start with the following check: Check account. Then check the result against this probable cause: password. Save context and time of appearance to compare behavior before and after correction. Priority level indicated: High.