Will not open in multi-user mode

Let me help you sort this out, @55526292.

Let's start by running the Quick Fix my Program feature directly from the QuickBooks Tool hub. This way, QuickBooks will automatically run a quick repair on your program by closing all the background processes.

But first, may I know if you received an error message? Sharing brief info of your current situation helps me provide the appropriate troubleshooting steps to resolve the error message on your end.

Even so, here's how you can run the Quick Fix my Program feature:

1. Download the QuickBooks Tool hub.
2. Open and install the downloaded file.
3. On the QuickBooks Tool app, select Program Problems.
4. Click Quick Fix my Program.

Please know that you'll have to open this tool on the computer which is hosting your company file for the multi-user mode.

I've got you this article for more insights about the troubleshooting steps: What to do if you can't open QuickBooks Desktop?

Please let me know how it works in the comment section down below. I'm always around happy to help.

Thank you for your quick reply.

I was finally able to get the program to allow multi-user mode. What I did:

Rebooted my server - did not work.

Ran QB Database Server manager on server. Showed error message about a service that did not start. Opened Services console and stopped all services. Tried to restart QB. - Did not work.

Shutdown my server. Waited few minutes. Restarted server. Now its working.

I'm not sure if this tells you what problem could be. All started this morning after a single user updated his computer to newest version. Talking to others here, this same problem happens often here (at least once per month), and a hard reboot of the server is the only solution we've found that works.