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STATUS_NO_USER_SESSION_KEY
No user session key is available for the logon session
This status is about logon-session security material, not about the existence of an RDP window. A caller requested a user session key, but the referenced logon session does not have one available in that context.
The cause can be authentication package behavior, local versus network logon differences, token/session mismatch, or a caller using a stale or wrong logon session reference.
What to inspect
- Identify the logon type and authentication package for the token involved.
- Check whether the caller is using a token from the intended user session.
- Distinguish logon-session state from Terminal Services session state; they are related but not identical.
References
- Microsoft: Access tokens
- Microsoft: Authentication level constants
- Microsoft Open Specifications: NTSTATUS values
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