Hello
Thank you for your question and reaching out. I can understand you are having query\issues related to CAL Licensing
No matter how many devices a user uses to access the server to use services like file storage or printing, you must purchase a CAL for each one of them when you use the User CAL. If the employees of your firm want roaming access to the corporate network via several devices, unidentified devices, or simply if there are more devices than users in your organisation, buying a User CAL can make more sense.
Reference :
https://www.microsoft.com/en-us/licensing/product-licensing/client-access-license
--If the reply is helpful, please Upvote and Accept as answer--