Multi User Mode keeps switching to SIngle User without us knowing

Thank you so much for the insanely quick response. I will be honest it’s not fixed although I am sure what you told me will work. I went to the IT Dept and now they are kicking around upgrading and the computer where QB is stored is our server so they did t want me messing with that. I must say that was a good move on their part.  Ha ha thank you so much. I think you gave me something even better and that’s finally updating our system. 

Hello!

I am having some trouble with the MUM and SUM. When I sign in QB automatically signs me in under Multi-User Mode. I think during set up I got to pick and I just chose that one, but now if I am in MUM I can't import time sheets, modify customer names, etc. So then I have to sign off and switch to SUM, but once I close QB and open it back up next time I'm back in MUM. Help Please!

Hello @Willis Sinclair,

Let's download and run the QuickBooks tool to fix the issues with accessing your company data.

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.

But if you already perform these steps with the same results, you'll want to repair the QuickBooks itself.

1. Go to Start.
2. Select Control Panel.
3. Under Program and Features, select Uninstall a Program.
4. From the list of applications, select QuickBooks.
5. Select Uninstall/Change.
6. Click Repair.

Here's an article you can read to learn more about how you can repair QuickBooks: Repair your QuickBooks Desktop for Windows.

I've got you this helpful article in case you need some ideas about how you can restore a copy of your company data: How do I?

Keep me posted in the comments if you need more help.

Having the same issue and we've tried everything that was suggested in this post. It's to the point where we now have to run a scan in the Database Manager every morning just to get QB out of Single User Mode.

Thanks for joining us here, @majorc3rd.

I'd appreciate performing the steps outlined by my colleague. Since the issue persists, I recommend running the repair tool for QuickBooks Desktop. This tool can help fix common errors that can affect the performance of the software.

Here's how:

1. Back up your company file.
2. Restart your computer. To ensure there are no programs that may affect the repair.
3. Open the Windows Start menu, then select Control Panel.

   Note: If you're using Windows 8 or 8.1, search "Control Panel" in the Windows Start menu.

4. Select Programs and Features then Uninstall a Program.

   Note: If you don't see Programs and Features, select Programs instead. Then select Program and Features.

5. Select QuickBooks from the list of Programs, then Uninstall/Change.
6. Select Continue, or Next.
7. Select Repair, then Next.

   Note: The repair should start right away, but it may take a while to finish. You can leave it running, and come back once it's done.

8. Once done, select Finish.

   Note: You may have to restart your computer to complete the repair.

9. Update your QuickBooks to the latest release. This makes sure you have the most recent fixes and security updates.

Also, if you encounter errors when switching to multi-user mode, check out this article to fix the issue: How to fix Error H202 and H505?.

I've also added an article that'll help you learn the task you can perform when switched to single or multi-user mode: Features available and tasks you can perform in single or multi-user mode.

Keep me posted on how it goes, @majorc3rd. I'll be around to help.