I'll make sure that you can get rid of this error, darylkeizer.

Error H505 means something is blocking the incoming and outgoing communication to your company file and the multi-user connection to your server.

Usually, this error occurs when one of your workstations has been set to be the server for QuickBooks. To isolate the issue, you'll want to make sure that your server computer is the only one hosting multi-user mode. I'll show you how:

1. Open QuickBooks on any workstations where you see the error.
2. Don't open your company file. Instead, select File from the top menu bar.
3. Choose Utilities.
4. If you see the Host Multi-User Access option, don’t click it. If Stop Hosting Multi-User Access is an option, you have to select it.
5. Repeat these steps on all workstations where you see the error.

After checking the workstations, move on to your server computer. Here's how to do it:
 

1. Open QuickBooks on your server computer.
2. Go to the File menu.
3. Choose Utilities.
4. If you see the Host Multi-User Access option, select it. If Stop Hosting Multi-User Access is an option, don’t click it.

I also recommend reading our QuickBooks Database Server Manager User Guide to help ensure that all users on your network can seamlessly work together in QuickBooks Desktop from multiple computers.

If you have additional questions about the multi-user network, please don't hesitate to let me know. Feel free to tag me in your posts and comments.