Thank you for visiting the QuickBooks Community, liann62. I understand that things have been challenging for you with managing multi-user in QuickBooks Desktop. I also appreciate you for performing some steps to fix the issue. With this, let's perform another troubleshooting instruction so your user can log in to the other computer without logging out of your host computer.
Since disabling QuickBooks messenger nor restarting the Quickbooks DB Server didn't work. I suggest opening this article: Fix locked file errors in QuickBooks Desktop. This provides different methods how to fix multi-user issues, then start following solution three so you can begin resolving your concern.
If the issue persists, I suggest contacting our QuickBooks Desktop Support Team. They have the tools to pull your account and investigate the cause of the issue.
- Press F1 to open the Help window.
- From the search icon, type Contact Support.
- Click Contact us at the bottom part.
- Give a brief description of your issue about the multi user and click the Search button.
- You'll be routed through How to connect with a QuickBooks expert and you choose which one is best for you.
Lastly, you may refer to this article to view unexpected errors that you might encounter that can block the multi-user connection and how to fix them: How to fix Error H202 and H505.
Please don't hesitate to let me know if you should have any questions about this or anything else about the multi user. Take care and have a good one, liann62.
