QuickBooks Error H505 is a common issue that occurs when a user tries to access a company file that is located on another computer, and QuickBooks cannot establish a connection with the server. This error is part of the H series errors in QuickBooks, which are related to hosting issues.

Here is a step-by-step solution to fix QuickBooks Error H505:

Step 1: Check Hosting Settings

• Open QuickBooks on all computers.
• Go to the 'File' menu and select 'Utilities.'
• Verify that the host computer is set as the host in multi-user mode.
• If not, choose 'Host Multi-User Access.'

Step 2: Update QuickBooks

• Ensure you are using the latest version of QuickBooks.
• Go to the 'Help' menu and select 'Update QuickBooks Desktop.'
• Choose the 'Update Now' tab and click 'Get Updates.'
• Restart QuickBooks after the update is complete.

Step 3: Configure Firewall Settings

• Check the firewall settings on all computers.
• Add exceptions for QuickBooks ports:
  • TCP: 8019, 56728, 55378-55382
  • UDP: 30301
• Restart the computers after adjusting firewall settings.

Step 4: Verify QuickBooks Services

• Press 'Windows + R' to open the Run dialog.
• Type "services.msc" and press Enter.
• Locate and double-click the 'QuickBooksDBXX' service (XX represents the version).
• Set the startup type to 'Automatic' and click 'Apply.'
• Start the service and click 'OK.'

Step 5: Check Hosts File

• Open the hosts file on each computer:
  • C:\Windows\System32\Drivers\Etc\hosts
• At the end of the file, add the server's IP address and name.

Step 6: Use QuickBooks Database Server Manager

• Install QuickBooks Database Server Manager on the host computer.
• Scan the company file folder and check the results.
• If the company file is not listed, click 'Add Folder' to include it.

Step 7: Test Connection

• Open QuickBooks on each computer.
• Proceed to the 'File' menu and choose 'Switch to Multi-User Mode.'
• Ensure all computers can access the company file without encountering Error H505.

Step 8: Contact QuickBooks Support

For more help, get in touch with QuickBooks Support if the problem continues. Give them a thorough rundown of the actions you took and any error messages you encountered.

By following these steps, you should be able to resolve QuickBooks Error H505 and ensure smooth multi-user access to your company file.

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