Thank you for joining here in the thread @Henry56.
Yes, since you have two user licenses, you can have two users access in the same file. All you need to do is to set up a multi-user mode in your server and working station. Then, the rest of the users can access each file you have.
You can follow these steps on how to set up a multi-user network. But first, please know that the recommended set up is having the company file stored on the Host computer. Here's how:
You may use this article for more detailed information: Hosting your company data in multi-user mode in QuickBooks Desktop.
Once done, you can now proceed on how to set up a multi-user network. Please follow the on-screen instruction provided in this article: Set up and install a multi-user network for QuickBooks Desktop.
I'll add this article in case you need help on how to access QuickBooks Desktop remotely from a host or server computer: Open a company file located on a remote computer.
If you have additional questions, feel free to leave a message in the comment section. I'll be around here in the Community to help.