Windows 10 Activation via 365 E3 License

[Rashmika Opatha]

I have a Windows 10 / 11 E3 license assigned in 365 and had Windows Enterprise Eval version installed. Recently I upgraded from eval to Enterprise Standard by downloading the SKUs and applying them. It was running smoothly for a day or so and then started giving me this prompt saying my Windows in not activated. I have tried running the steps for the upgrade to apply the SKUs but still no luck. I do not have a license key with me as the licensing is via the 365 E3 license. Any advise would be highly appreciated. Thank you.

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