On the Server:
- Click the Start menu and type firewall.
- Click on Windows Firewall.
- On the right-hand side, click on Advanced Settings.
- Click on Inbound Rules to highlight it.
- Right-click on Inbound Rules and select New Rule.
- Select Port and click Next.
- Make sure TCP is selected and type in the following ports
for your year of QuickBooks: (if you have multiple years of QuickBooks
installed or will be using, you will need to add each years ports as
well in this format: 8019, XXXXX, XXXXX, XXXXX, XXXXX).
- QuickBooks 2016: 8019, 56726, 55368-55372
- QuickBooks 2015: 8019, 56725, 55363-55367
- QuickBooks 2014: 8019, 56724, 55358-55362
- QuickBooks 2013: 8019, 56723, 55353-55357
- Click Next and make sure Allow the Connection is selected, then click Next again.
- Click Next again and give the rule a name, such as QBPorts. Click Finish when done.
- Repeat the steps above for the Outbound Rules (for step 4 inbound rules, choose Outbound Rules).
- Try opening QuickBooks again in multi-user mode or over your network to see if the issue has been resolved.
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