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SEC_E_SECPKG_NOT_FOUND
SEC_E_SECPKG_NOT_FOUND signals this condition: The requested Security Support Provider (SSP) package was not recognized. The application asked SSPI for a named security package that is unavailable on this system. This can be a deployment mismatch, a missing Windows component, or an application configuration issue.
What to check
- Log the exact package name requested by the application, for example Kerberos, Negotiate, NTLM, Schannel, or CredSSP.
- Confirm that the client and server are configured to negotiate a package both sides support.
- Do not add or edit SSP registration values manually as a first response; identify why the application requested the missing package.
Microsoft: InitializeSecurityContext
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