QuickBooks multi-user mode not working on 2 of my systems. Help me out.
Why your multi user mode not working on QuickBooks-This usually comes down to hosting, services, or Windows/network permissions on the “server” machine where the company file lives.
To keep it quick, here’s a focused checklist you can run through; if you tell what error code you see (H202/H505/etc.), the steps can be narrowed down further.
1. Confirm the basics
Make sure the company file is on a “server” or main PC and all workstations open the same .QBW path (for example \\SERVERNAME\QBData\YourFile.QBW).
Verify all systems are on the same network and can see each other (you should be able to browse to \\SERVERNAME\ from the problem PCs). Windows network discovery and file sharing should be turned on.
2. Check hosting settings
On the server (where the file is stored):
Open QuickBooks Desktop → File → Utilities.
It should show “Stop Hosting Multi-User Access”. If you see “Host Multi-User Access”, click that so the server hosts the file.
On each workstation, File → Utilities should show “Host Multi-User Access” (do not host on workstations). If it says “Stop Hosting…”, click it once to turn hosting off there.
3. Make sure QB services are running on the server
On the server:
Press Windows+R → type services.msc → Enter.
Find QuickBooksDBXX and QBCFMonitorService (XX = version year).
Startup type: set to Automatic; Service status: Running. If stopped, start them.
On Recovery tab, set First/Second/Subsequent failure to Restart the Service, then Apply/OK.
After that, retry multi-user mode from the problem workstations.
4. Fix folder permissions and sharing
On the server, for the folder that holds the .QBW:
Right-click folder → Properties → Sharing tab → Share/Advanced Sharing → enable Share this folder.
In Security tab → Edit → ensure QBDataServiceUserXX and the user group accessing QuickBooks have Full control; Apply/OK.
If anything changes here, test multi-user again.
5. Use QuickBooks Tool Hub / File Doctor
From any affected workstation (or the server):
Download and install latest QuickBooks Tool Hub from Intuit, then open it.
Go to Company File Issues and run QuickBooks File Doctor, choosing your company file and the option that checks network and file issues.
Also use the Network Issues section to run the connection diagnostic for H-series errors.
If you reply with:
Exact error message/code (e.g., H202, H505, “can’t connect to server”),
Which PC is acting as the server,
Your QuickBooks Desktop year/edition and Windows version,
a precise, click-by-click fix can be laid out just for your setup.

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