How to Troubleshoot QuickBooks Error H505?

by Mason Olivia Digital Marketing

A QuickBooks user can encounter QuickBooks Error H505 when he or she attempts to switch from single-user mode into QB multi-user mode. The occurrence of this error means that QuickBooks in multi-user mode is unable to connect to the server.

If QuickBooks Error Code H505 appears on the screen, it may be because of one or more of the users’ computers is set to be the QB server. The users’ computers can function in multi-user mode, but only the server, i.e. computer hosting the company files should be the only machine configured to act as the host.

What are the causes of QuickBooks Error H505?

Various factors can lead to QuickBooks H505 Error –

  • .ND file is damaged or incorrect. Without a functional .ND file, QuickBooks is unable to access the files on a network.
  • QuickBooks services – QuickBooksDBXX and QBCFMonitor are not running.
  • The IP address of the server cannot be found.
  • Hosting has not been configured properly.
  • The server does not have to host mode turned on.
  • QB firewall ports are not configured properly. Communication between QuickBooks and server is not taking place because of improper firewall settings.
  • There is some problem with the DNS setting.

Symptoms of QuickBooks Error Code H505

When QuickBooks Error Code H505 occurs, a user can get the following symptoms –

  • A multi-user mode cannot be used.
  • The user fails to open the QB company file stored on the server.
  • QuickBooks program window gets crashed.
  • QuickBooks Error Code H505 flashes on the screen.
  • A laptop or desktop computer crashes again and again.
  • Windows may become unresponsive and freeze periodically.
  • QuickBooks frozen and you have to wait for it to respond.

Solutions to fix QuickBooks Error H505

To fix QuickBooks H505 Error, you can try the solutions that are given here below –


The hosting mode should be off on the users’ computers and turned-on on the server.

  • First of all, you have to open QB on all of the users’ computers that are showing an error H505.
  • Navigate to the QuickBooks menu and click on the File menu.
  • Choose Utilities under the File menu.
  • Now, look for an option with the name – Host Multi-User Access. If it is there, do not choose it. This means that this particular computer is not leading to any problem. You can simply go to
  • the next computer.
  • If you see an option with the name – Stop Hosting Multi-User Access – choose it.
  • The above-given steps are to be repeated on all of the users’ computers or workstations that are getting this error.
  • After you have covered all of the users’ computers, go to the server computer.
  • On the server, open QuickBooks.
  • Navigate to the QB menu and click on the File menu.
  • Choose Utilities under the File menu.
  • If in case, you see an option with the name – Host Multi-User Access – choose it. If in case, you see an option with the name – Stop Hosting Multi-User Access – do not choose it.

Sponsor Ads

About Mason Olivia Committed   Digital Marketing

382 connections, 6 recommendations, 1,624 honor points.
Joined APSense since, May 2nd, 2018, From California, United States.

Created on Feb 11th 2020 22:08. Viewed 327 times.


No comment, be the first to comment.
Please sign in before you comment.