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CO_E_FAILEDTOGETSECCTX
COM could not obtain the server security context
CO_E_FAILEDTOGETSECCTX is HRESULT 2147549476 (0x80010124) from winerror.h. AllStat describes it as “Unable to obtain server's security context.” In the COM IAccessControl, DCOM client identity, trustee translation, token inspection, security descriptor, ACL, or serialization workflow, the code identifies a specific failure boundary and should not be replaced by a generic COM exception.
Telemetry should preserve this result as a separate outcome rather than merging it with unrelated COM or WinRT failures.
Where it is encountered
- IAccessControl initialization, access checks, owner/trustee processing, and serialized ACL persistence. Record the interface, method, component version, thread, apartment, process, and correlation ID.
- Server-side DCOM impersonation, client blanket inspection, token and SID lookup.
- Security descriptor construction, DACL canonicalization, file-backed policy storage, or legacy NetAccess migration.
The immediate focus for it is access-control or security logic that needs the current server-side RPC security context but cannot retrieve it. Keep it attached to that operation; the same numeric severity outside the owning API does not supply enough context.
Decisive interpretation boundary
Before choosing recovery, verify that the code runs on the server side of an active secured call and the authentication service exposes the required context. If this condition cannot be proven for it, stop before consuming outputs or repeating side effects.
Also confirm that all observed objects, tokens, buffers, proxies, metadata files, or ACLs belong to the current operation generation and were not retained from an earlier attempt.
Difference from nearby HRESULTs
It concerns the complete security context; token-specific failures identify later extraction steps.
Tests for it should force both results and verify that object lifetime, output use, and user messaging differ.
Correct handling and recovery
Keep security-sensitive work inside the call, validate binding security, and avoid assuming a client identity when context retrieval fails.
Backoff alone is not a repair for it; a measurable state or configuration transition must justify another attempt.
Practical scenario
An authorization helper is invoked from a timer rather than a COM method and cannot get security context. The caller passes an explicit audited identity snapshot.
A regression test should reproduce it, assert the raw HRESULT and all relevant outputs, then correct only the decisive condition and verify the intended success or neighboring failure result.
Lifetime, retry, and cleanup rules
After it, determine whether the current object, interface pointer, call context, token, stream, metadata reader, asynchronous operation, or access-control instance remains valid. Release only resources owned by the failing attempt, cancel callbacks through their documented mechanism, and avoid double close, double commit, repeated activation, or replay of a non-idempotent remote method.
The retry policy for it should state the trigger, maximum attempts, cancellation owner, and reconciliation step for effects that may have completed elsewhere.
References
- Microsoft: IAccessControl
- Microsoft: IAccessControl::IsAccessAllowed
- Microsoft: AccessCheck
- Microsoft: LookupAccountSidW
- Microsoft: LookupAccountNameW
- Microsoft: access control lists
- Microsoft: canonical ACE order
- Microsoft: HRESULT values
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