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SEC_E_NO_IMPERSONATION
SEC_E_NO_IMPERSONATION signals this condition: The current security context does not permit client impersonation. The authentication context was established without an impersonation level that permits the requested operation. This is often seen when an application assumes it can access a resource as the client after authenticating the client.
What to check
- Verify the impersonation level requested when the context was created.
- Check whether policy or the negotiated package intentionally limited impersonation.
- Keep access checks explicit: use the service identity when client impersonation was not negotiated rather than assuming delegation is available.
Microsoft: InitializeSecurityContext
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