Hello Dan,
Thank you for posting in Q&A forum.
You can upgrade from Windows 10/11 Pro to Windows Enterprise E5 directly and skip E3 if only you have a licensed version of Windows 10 Pro or Windows 11 Pro to activate the subscription.
Please refer to below link for further information.
https://learn.microsoft.com/en-us/windows/deployment/deploy-enterprise-licenses
To help other customers who may be facing the same issue, please don't forget to vote if the reply is helpful.
Best Regards,
Shujun
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