I agree with Fiat's recommendation, @Damien1.
To further assist you on how to set this up, I've listed the process you can follow. To start, you'll need to set up your QuickBooks Desktop (QBDT) first. If you haven't yet, refer to Step 1 of this article: Install QuickBooks Desktop on a server.
Next, ensure that QuickBooks Database Server Manager is installed on the computer that hosts your company files (server computer). Then, use it to scan the folder that holds your files.
When verified, set up folder permissions on your server computer to ensure that this has permission to be on your network.
After that, adjust your Firewall and Internet security settings so QBDT and Database Server Manager can run on your network.
Then, set up the admin rights to make sure you can sign in to your server computer using your account.
Once you're done setting up everything outside of QBDT, you're next step is to turn on Multi-user Access on your server computer:
- In your QuickBooks Desktop, go to the File menu.
- Next, hover over Utilities and select Host Multi-User Access.
- Then, click Yes to confirm.
Finally, you can now install your workstations. For reference, refer to Step 8 of this article: Install QuickBooks Desktop on a server.
I also include this link that you can open to learn more about QuickBooks Desktop hosting and multi-user mode: Hosting your company data in multi-user mode in QuickBooks Desktop.
Once everything is fine, refer to this page for detailed instructions on how you can access your QBDT remotely from a host or server computer: Open a company file on a remote computer.
If you have anything else to ask or other questions about setting up a multi-user network in QBDT, please don't hesitate to leave a reply below. I'm always here ready to provide additional assistance. Have a good one.
