HRESULT 0xC00D271F (NS_E_DRM_INVALID_LICENSE

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Description:

License acquisition did not work. Acquire a new license or contact the content provider for further assistance.%0

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NS_E_DRM_UNABLE_TO_ACQUIRE_LICENSE	NS_E_DRM_NO_RIGHTS

NS_E_DRM_INVALID_LICENSE_ACQUIRED

How to classify this result

The symbolic result NS_E_DRM_INVALID_LICENSE_ACQUIRED narrows 0xC00D271F to license challenge, acquisition and server response processing. In practical terms, the server response completed but the returned license is not acceptable to the client; the producing layer is the asynchronous path that builds a license request from the protected content header, sends or exposes the challenge, receives a response and commits accepted licenses to the local store.

The built-in message summarizes the user-visible outcome, while the symbolic phrase “invalid license acquired” preserves the exact WMDRM boundary for diagnosis. For this code, the proof step is to retain response metadata, license issuer, KID, certificate and validation stage.

How to prove the condition

Locate the earliest API return, callback or event containing NS_E_DRM_INVALID_LICENSE_ACQUIRED and 0xC00D271F.
Identify the exact content, license, store, device or migration object generation involved in “invalid license acquired”.
Determine whether “invalid license acquired” occurred before network exchange, during response validation, while enforcing policy, or while committing protected state.
Perform the code-specific check: retain response metadata, license issuer, KID, certificate and validation stage.
Make one narrow correction — correct issuer/server output or acquire a compatible license — and repeat the same producing operation.

Which component owns the failure

Do not flatten NS_E_DRM_INVALID_LICENSE_ACQUIRED into a generic DRM error. License acquisition and license storage are separate stages: a valid server response can still fail while being validated or committed locally. The second relevant rule is that because acquisition is asynchronous, starting a second request before the completion event can produce a state error rather than a network failure.

Diagnostic inputs that separate the causes

Capture the first NS_E_DRM_INVALID_LICENSE_ACQUIRED occurrence before retry or teardown changes state. The smallest useful record contains:

Code-specific proof: retain response metadata, license issuer, KID, certificate and validation stage.
Protected identity: store commit result after a successful server response.
Operation state: content KID and license acquisition URL from the header.
Persistence or transport: silent or non-silent acquisition mode and callback/event sequence.
Security context: request or challenge identifier and response HTTP status.
Correlation point: server certificate, response signature and returned license count.

Prefer IDs, hashes, sizes, and timestamps. Never log keys, passwords, licenses, or decrypted media.

Common but unsafe responses

Avoid blindly retrying a state-changing license request without correlating the previous challenge and completion event. That changes evidence without demonstrating why NS_E_DRM_INVALID_LICENSE_ACQUIRED was produced.
Avoid logging complete license challenges, responses, cookies or credentials in diagnostic output. That shortcut can create a second store, identity or policy problem.
Do not reduce NS_E_DRM_INVALID_LICENSE_ACQUIRED to “DRM failed” in telemetry; retain the HRESULT, symbolic name, operation and object identity.

What a supported fix should change

The corrective direction is to correct issuer/server output or acquire a compatible license. Preserve the original content/header, store or migration material for NS_E_DRM_INVALID_LICENSE_ACQUIRED until the operation succeeds and survives a fresh application object or required restart.

Representative case: HTTP succeeds, yet the license in the response fails client validation.

Do not merge these HRESULTs

Result	Different boundary
`NS_E_DRM_UNABLE_TO_ACQUIRE_LICENSE`	The acquisition workflow did not produce a usable license.
`NS_E_DRM_INVALID_LICENSE_REQUEST`	The generated or supplied license request is not valid for the protected content.
`NS_E_DRM_ACQUIRING_LICENSE`	Another license acquisition is already active for the DRM object.

Order the NS_E_DRM_INVALID_LICENSE_ACQUIRED event chain by timestamp; prefer the earliest specific result.

How to know the fix is real

After the repair, recreate the WMDRM object and run the smallest reproducer for NS_E_DRM_INVALID_LICENSE_ACQUIRED. Confirm that 0xC00D271F no longer occurs, that the intended license action completes, and that no store, certificate, clock or migration warning replaces it.

Code-specific operational note

The symbolic phrase “invalid license acquired” is the important search and telemetry key for NS_E_DRM_INVALID_LICENSE_ACQUIRED. Keep it beside the exact value 0xC00D271F; the official message “License acquisition did not work. Acquire a new license or contact the content provider for further assistance.” is useful to users, but it does not identify the producing API, object generation or protected identity on its own.

Technical references

Acquiring licenses — API and state rules relevant to this boundary.
Handling license acquisition events — platform documentation used to distinguish this result from adjacent results.
DRM protection and license distribution — official Windows Media DRM context for NS_E_DRM_INVALID_LICENSE_ACQUIRED.
DRM client programming guide

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