Hi
yes, you need CALs for every user. See explanation here:
https://www.microsoft.com/en-us/licensing/product-licensing/client-access-license
If in an AD environment, they will likely be using Print Server/File Shares/DHCP etc, so a cal is required for all users. The other option is Device CALs, but User CALs normally make the most sense.
Hope this helps,
Thanks
Michael Durkan
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