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STATUS_THREAD_ALREADY_IN_SESSION
The thread is already bound to a session
This status appears when low-level code tries to place a thread into a session context that is already established. Session association affects access to session-specific resources, window stations, desktops and named-object namespaces.
It is a state-management problem, not a user password or RDP negotiation issue. The caller should track the thread/session lifecycle rather than repeatedly applying a session attachment operation.
What to inspect
- Check whether the code reuses worker threads across session-sensitive operations.
- Record the current and requested session IDs.
- Validate that cleanup paths run before returning the thread to a pool.
References
- Microsoft: Kernel object namespaces
- Microsoft: Terminal Services API portal
- Microsoft: WTSEnumerateSessions
- Microsoft Open Specifications: NTSTATUS values
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