Dear tangerald
Thank you for posting in the Microsoft community.
Batch activation of Windows systems in offline environments can be achieved in several ways. The following solutions are based on the Windows activation mechanism, depending on the activation method used (KMS, MAK or phone activation mode). In the meantime, we will focus on how to batch generate and enter installation IDs to complete activation without Internet (completely offline).
Batch activation using KMS server (recommended method)
KMS (Key Management Service) is a bulk activation service provided by Microsoft for enterprise environments, especially on devices that do not have an Internet connection. With a KMS server, activation can be done automatically on the local network.
KMS is the recommended solution for most enterprise offline environments.
KMS automatically manages activation renewals every 180 days.
Suitable for a large number of devices and easy to manage centrally.
A separate KMS server is required.
Customer service phone numbers - Microsoft Support
You can contact Microsoft's corporate sales in your area for further information.
Best Wish
Shawn.Z-MSFT | Microsoft Community Support Specialist