Guys thank you for your informative comments surely I learned just by reading them. I am not sure if I do need CALs
Here's my case, I have a Domain Controller and all my client computers logs in to the domain, I have a file sharing, I don't published printer or fax in AD, for now there's nothing much services but AD, DNS, and DCHP. Thanks again guys!
Jeff if these answers helped solve your problem, please be sure to mark the answer and any assists.
Windows OS
This topic area includes legacy versions of Windows prior to Windows 2000: Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions including Windows Mobile.