What does HRESULT 0x803FA066 (SL_REMAPPING_MDOLLAR_INVALID_BINDING) mean?

SL_REMAPPING_MDOLLAR_INVALID_BINDING

Within Microsoft-hosted activation and product-key rule processing SL_REMAPPING_MDOLLAR_INVALID_BINDING (0x803FA066) reports that the activation service found that the product key binding does not match the product or device context presented by the request. Treat it as the hosted activation invalid binding condition and start with partial key and product key ID, not with the final dialog text.

Why this HRESULT is specific

Activation data binds a key or entitlement to product metadata and, in some channels, a device or manufacturing association. The service rejected that relationship before granting activation.

How to distinguish nearby failures

Nearby condition: It is narrower than INVALID_PRODUCT_DATA: the decisive issue is the relationship between otherwise identifiable objects. Hold partial key and product key ID constant while changing only the prerequisite described.

Evidence that can change the diagnosis

• Primary record: partial key and product key ID.

Controlled troubleshooting sequence

1. Record the earliest event stating that the activation service found that the product key binding does not match the product or device context presented by the request, together with the code, UTC time, and the same identity fields.
2. Change one prerequisite: For OEM scenarios, validate the firmware marker and image edition together; do not combine this with a store reset, key replacement, account removal, package reinstall, or unrelated repair.
3. Repeat the user operation: Re-run the original operation and require that the corrected product and device context produces a valid binding; if another HRESULT appears, diagnose it as a separate result.

Evidence-preserving cautions

While investigating this result, do not copy licensing stores from another machine; that creates another binding mismatch and destroys provenance.

Verification

The incident is resolved only when the corrected product and device context produces a valid binding.

Technical references

• Microsoft Win32 metadata: winerror.h — status definition reference.
• Microsoft: SoftwareLicensingProduct WMI class — owning service/API reference.
• Microsoft: Slmgr. Vbs options — diagnostic/remediation API reference.
• Microsoft: Troubleshoot Windows activation error codes — lifecycle reference.