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SEC_E_NOT_OWNER
SEC_E_NOT_OWNER signals this condition: The caller does not own the credential handle it attempted to use. This is usually an application context-lifetime or impersonation-boundary error. A credential handle created by one security context cannot be reused arbitrarily by another caller or session.
What to check
- Trace where the credential handle was acquired, stored, duplicated, and released.
- Check whether the request crossed a process, user-token, or impersonation boundary.
- Create or acquire credentials in the same security context that will use them instead of caching opaque handles across identities.
Microsoft: InitializeSecurityContext
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