Good morning, @drew1.

Thanks for taking the time to reach out to the QuickBooks Community. I hope you're having a great day so far. 

Typically when QuickBooks POS workstations aren't connecting to the server, the most likely culprits are network connectivity issues, firewall restrictions, incorrect server settings (like not being in multi-user mode), or problems with the QuickBooks POS database service on the server machine.

Since you've stated your network is working you'll need to check that the server is in multi-user mode, verify firewall rules, and restart the QuickBooks POS database service on the server to troubleshoot the issue.

When a firewall blocks connectivity within the server and client workstations, Point of Sale automatically configures the firewall for you. However, there are times when manual configuration is required. I suggest performing the steps below to make sure your software or account stays accurate.

Here's how:

1. From your keyboard, press Windows+R to open the run command.
2. Type in control. Then, click OK to open the Control Panel.
3. Set the "view by" to Small Icons and select Windows Firewall.
4. Choose Advanced Settings and select Inbound.
5. Click New Rule. Then, select Port and click Next.
6. Enter the port numbers and click Next (See Point of Sale Firewall Ports section of the help article below)
7. Select Allow Connection. Then, choose Next.
8. Name your firewall rule (e.g. POS) and click Finish
9. Follow steps 5-9 to create a new Outbound Rule.

For a list of port numbers and more information about firewall and security, check out Set up firewall and security settings for QuickBooks. 

Please let me know if you have any additional questions or concerns. I'm always around to lend a hand. Have a good one!