Dear Pascal,
I hope you’re having a good day.
Thank you for the detailed explanation and the screenshots.
Based on the information you've provided, I believe this is less likely to be an Office activation issue and more likely to be a licensing entitlement, enrollment, or tenant association issue.
The most important detail in the screenshot is that Microsoft recognizes the product key as valid, but returns the message: "The product key is valid, but your organization is not eligible for this offer."
This suggests that the key itself is not the problem. Instead, there appears to be an issue with how the licensing agreement, tenant, or entitlement has been associated.
Since the licensing agreement was purchased through your CSP, I would strongly recommend contacting ADN first. As the licensing provider, they can verify:
- The contact details associated with the Open Value agreement.
- Whether the agreement is linked to the correct tenant.
- Whether the Education entitlement has been fully provisioned.
- Whether any enrollment or licensing corrections are still required.
If necessary, the CSP can also open a Microsoft support case on your behalf and work directly with the appropriate licensing team. Given the symptoms you described, this may be the fastest path to resolution.
In parallel, if you are unable to create a support request from the affected tenant, you may also contact Microsoft directly using the customer support numbers listed here: Customer service phone numbers - Microsoft Support
Thank you again for providing such detailed information and I hope this information helps point you in the right direction.
Warm regards,
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