Hi Paweena Uoophakdee,
Thanks for your post in Microsoft Community.
Based on your description, it seems like that you 're curious as to why users without credentials can install the OneDrive application, we can fully understand your distress and will do everything we can to help you.
Could you clarify whether the users you're referring to have business accounts or personal accounts?
What I need to clarify is that for individual users, OneDrive is inherently a free application that anyone can download onto their devices. Registering for a Microsoft account is also free and comes with 5GB of complimentary cloud storage. This means that anyone with a Microsoft account has 5GB of storage space, and once you download the OneDrive application, you can use this 5GB space for syncing and backup purposes.
We look forward to your update. If you have further questions, please feel free to contact us!
Thanks for your cooperation and understanding. I hope that you are keeping safe and well!
Best Regards,
Thomas C - MSFT | Microsoft Community Support Specialist
