QuickBooks Hosting Mode is Off: How to Enable Multi-User Access & Fix It

Written by Meghan McKenzie | Published: October 9, 2026

If QuickBooks Hosting Mode is off, the computer on which your company file is stored is not configured to share the file, and therefore other users will not be able to open it in multi-user mode. The quickest solution is to open QuickBooks Desktop on the server computer alone, choose File > Utilities, and then select Host Multi-User Access.

If this option is missing, greyed out, or keeps turning itself off, the problem is most often due to QuickBooks Database Server Manager, the firewall, or folder permissions. This guide shows you how to carry out each of the fixes in turn, starting with the simplest and ending with the more complicated ones.

A Quick Overview Table on Hosting Modes in QuickBooks

QuickBooks identifies three hosting states, as the table below shows how each appears on the screen.

As a general rule, only one computer should function as the host, and that computer should manage only the local files; when a second computer serves as the host, errors stating that QuickBooks Hosting Mode is Off occur far more often because two machines compete for control of the same file.

What Does “QuickBooks Hosting Mode is Off” Mean?

QuickBooks Desktop enables the company file to be shared across the network by means of a simple client-server setup: one computer, known as the server, holds the company file (.QBW) and operates the QuickBooks Database Server Manager, while all the other computers, which are workstations, connect to that file via the server. For this to function, hosting must be turned on on the server and turned off on all the other computers.

If the server is not running, the workstations cannot access the company file in multi-user mode, and you will either see a simple message stating that hosting is off or one of the usual multi-user errors, for example H101, H202, H303, or H505. People describe this same issue in different ways, such as saying hosting won’t switch on, you can’t activate hosting mode, or multi-user access isn’t working; all of these refer to the same basic setup.

How to Turn On QuickBooks Hosting Mode (Quick Fix)

If the only thing you need to do is switch on hosting mode in QuickBooks, then this brief guide is generally sufficient. Log in to the server computer using a Windows administrator account, and ask everyone to close the company file before you start.

• Log in to the server and then open QuickBooks Desktop to access your company file.
• If you open the file in multi-user mode, select File > Switch to Single-user Mode.
• Go to File and then choose Utilities. If Host Multi-User Access is available, select it.
• When QuickBooks tells you that the company file must be closed, select Yes and then Yes again to confirm your intention to host it.
• To reopen the file, select Utilities and make sure that the option now says ‘Stop Hosting Multi-User Access‘; this wording indicates that hosting is active.
• Go to File, then switch to Multi-user Mode and stay with QuickBooks open for a moment.
• For each workstation, open QuickBooks Desktop, go to File, then Utilities, and make sure the option says Host Multi-User Access; if it says Stop Hosting Multi-User Access, select it, then click Yes to turn off hosting on that workstation.
• To check that multi-user access is working, open the company file from a workstation.

If the option is greyed out, missing, or returns to its previous state, do not repeat these steps. Instead, go on to the remedies that follow since something more fundamental, such as a stopped service or a blocked port, is causing the problem.

What Causes QuickBooks Hosting Mode to Turn Off?

Hosting rarely switches off without a reason. In most cases, one of the following is responsible:

• Hosting is switched off on the server or switched on on a workstation; only the server should be set to host, since setting it incorrectly can disrupt the setup.
• The QuickBooks Database Server Manager is missing, outdated, or not running, since this service allows the company file to be shared over the network.
• A firewall or an antivirus program is blocking communication since QuickBooks needs certain ports and programs to be allowed through.

• Windows permissions or the folder are incorrect; the folder containing the company file should be accessible to the QuickBooks service account.
• The .ND network file is damaged; the small configuration file which is situated alongside your company file can become corrupt if the system is shut down unexpectedly.
• The server and workstations cannot communicate, and the cause might be a faulty cable, unstable Wi-Fi, or a DNS issue.
• The server is not listed in the Windows hosts file, and although the server is running, the workstations can’t find the host when name resolution fails.

Start with the table below; the solutions are presented from simplest to most complicated, so working through them from top to bottom will save time.

How to Fix QuickBooks Hosting Mode is Off: Comprehensive Steps

Before you change anything, create a backup. On the server, open your company file and go to File > Back Up Company > Create Local Backup, then follow the prompts. A current backup means you can experiment with confidence.

Solution 1: Install or Update QuickBooks Database Server Manager

QuickBooks Database Server Manager creates and maintains the network data files that let workstations find your company file. It must be installed on the server, and its version must match your QuickBooks Desktop release.

• Download and install the latest QuickBooks Tool Hub from Intuit, then close all programs.
• Open the Tool Hub and select Network Issues.
• Select QuickBooks Database Server Manager. If it is not installed, QuickBooks offers to install it.
• During setup, choose the option that fits your server. Select the first option if you also use QuickBooks on the server, or the server-only option if the computer simply stores the file.
• When installation finishes, the Database Server Manager opens. Go to the Scan Folders tab, select Browse, choose the folder that holds your company file, and select Start Scan.
• Select Close when the scan finishes, then try the hosting steps again.

Try this first. A missing or outdated Database Server Manager is the single most common reason hosting will not turn on.

Solution 2: Rename the .ND and .TLG Files

The .ND (network descriptor) and .TLG (transaction log) files are regenerated automatically, so renaming them is safe. Doing so clears out damaged connection settings.

• On the server, open the folder that contains your company file.
• Locate the files that have the same name as the company file and end with .ND and .TLG.
• Click the right mouse button on each file, choose Rename, and add .OLD at the end of the filename.
• To rebuild the .ND file, open the Database Server Manager, move to the Scan Folders option, and choose Start Scan again.
• Open QuickBooks and carry out the hosting steps mentioned in the quick fix.

A fast and low-risk reset; use it in the case where a host revert occurs after it has been enabled or when the folder scan fails.

Solution 3: Run QuickBooks File Doctor

QuickBooks File Doctor can repair common company file and network problems. Install the latest Tool Hub before using File Doctor, since an outdated version often causes the scan to fail or the program not to open.

• Go to the QuickBooks Tool Hub and choose Company File Issues.
• Select Run QuickBooks File Doctor; it might take up to a minute to open.
• Select your company file from the drop-down list; if the file is not there, click Browse and then Search to find it.
• Choose to check your file and network, then click Continue.
• Type in your QuickBooks administrator password and then click Next.
• Wait for the scanning to be completed; it usually takes between 10 and 15 minutes, and longer if the file is large.
• Even if File Doctor repairs the problem, it might still show that the operation was unsuccessful. Open QuickBooks and test multi-user access before running the scan again.

Try this if the first two solutions don’t work, especially if you suspect file damage or network issues.

Solution 4: Set Correct Folder and Windows Access Permissions

QuickBooks company file access problems can also appear with QuickBooks Error 6000, especially when the file cannot be accessed correctly from the network.

• On the server, open File Explorer and find the folder in which your company file is stored.
• To do this, right-click on the folder, choose Properties, and then switch to the Security tab.
• Choose Edit and then pick QBDataServiceUserXX from the list; the letters XX represent your QuickBooks Desktop version. If it doesn’t appear in the list, select Add and enter the name yourself.
• In the Permissions section, check the box next to Allow for Full Control, then click Apply and OK.
• Repeat the same steps for the Windows user accounts that open the file from the workstations.
• Be certain that you are logged into Windows as an administrator when carrying out these changes.

Necessary when workstations encounter access errors and easy to check even if all else appears to be correct.

Solution 5: Configure Windows Firewall Port and Program Exceptions

A main cause of connection problems is a window firewall blocking QuickBooks; first allow the QuickBooks port, then the QuickBooks programs.

• On the server, open Database Server Manager and then select the Port Monitor tab, noting the port number that corresponds to your version of QuickBooks.
• Click on the Start menu, search for Windows Defender Firewall with Advanced Security, and then open it.
• Choose ‘InboundRules‘ and then select ‘NewRule‘.
• Select Port, then click Next, choose TCP, and enter the port number from the Port Monitor tab under Specific local ports.
• Click Allow for the connection, apply the rule to the Domain, Private, and Public profiles, give it a clear name for example, QBPorts, and then select Finish.

• Also set up the same rule under the Outbound Rules.
• Likewise, add the program exceptions for QBDBMgrN.exe, QBDBMgr.exe, QBW32.exe, and QBCFMonitorService.exe; the programs can be found in the Intuit folder within Program Files.
• When you are using antivirus software that is provided by a third party, you should include the same ports and programs in its exclusion list.

The most probable cause is that the workstations time out or that the server hosts the service but nowhere else.

Solution 6: Ping the Server From Each Workstation

A ping test can be used to determine whether a workstation can reach the server.

• First, open Command Prompt on the server, enter the hostname, and press Enter. Take note of the server name.
• On each workstation, open Command Prompt, type ping followed by the server name (use the actual name), then press Enter.
• Check the results; you need 0% packet loss and consistently fast replies.

• If the pings don’t work, carry out the test again using the server’s IP address, which you can obtain by typing ipconfig on the server.

• If the IP address works but the name does not, you have a name resolution problem, and Solution 7 is your next step. If neither works, check your cables, router, and Wi-Fi connection.

This is a fast diagnostic. It tells you whether the problem is QuickBooks or your network.

Solution 7: Edit the Windows Hosts File (Last Resort)

The hosts file maps computer names to IP addresses, and adding your server to it lets workstations find it when normal name resolution doesn’t work.

• To do this, click on Start, enter Notepad, right-click on it, and then choose Run as administrator.
• In Notepad, select File, then Open and navigate to C:\Windows\System32\drivers\etc; change the file filter to All Files and open the hosts file.

• At the bottom, include a new line consisting of the server’s IP address, followed by a space or a tab, and then the server name.
• Choose File > Save, and then restart QuickBooks before testing again.

Since wrong entries might lead to new problems, you should copy the original file before making changes to it. Reserve it for use only after all other options have failed and specifically when your ping test indicates a name resolution issue.

QuickBooks Hosting Mode is Off on Windows 11: Operating System Specific

If your server or workstations run Windows 11, the solutions mentioned still apply. The QuickBooks steps remain the same, but some Windows 11 features might catch you out.

• First, check whether version support is available. Make sure that your version of QuickBooks Desktop is supported on Windows 11 according to Intuit’s system requirements. A version that is not supported is a typical cause of odd hosting behavior.
• To locate the firewall. You can still search for Windows Defender Firewall with Advanced Security in the Start menu, and Windows Security now provides the same controls. The inbound and outbound rules that you set up in Solution 5 function in the same way as they do on Windows 10.
• Here is the network profile: ensure that the network is set to Private rather than Public, since a Public profile enforces more stringent rules and might block the connection between your computers.
• Permission prompts. When you make changes to folder permissions, the hosts file, or the services, User Account Control prompts will appear more frequently. You should approve them, or the changes will fail silently.
• To find Database Server Manager. Since the Start menu layout differs from Windows 10, open All apps and look in the QuickBooks folder, or search for the tool by name.
• File-sharing rules have become stricter in recent versions of Windows 11, especially around SMB signing and insecure guest access. On an older network, this might impact the ability of workstations to access a shared folder, so if all else has been checked, then you should ask your IT contact to verify these settings.

When removing an earlier version of Tool Hub from Windows 11, you should use Settings > Apps > Installed apps and then install the most recent release. To sum up, carry out Solutions 1 to 7 in order and keep the details mentioned above in mind as you do so.

“QBDBMgrN Not Running on This Computer”: What It Means and How to Fix It

QBDBMgrN is the program used by the QuickBooks Database Server Manager. If you see the message that QBDBMgrN is not running on this computer, then the service has either stopped or failed to start; this is different from a general hosting misconfiguration in which the service is running but has not been set up correctly. The message typically appears with H202 or H505 errors, and workstations can’t access the company file until the service is restarted.

Follow these steps on the server:

• Press the Windows key plus R, type services.msc, and then press Enter.
• Go to QuickBooksDBXX, with XX representing your QuickBooks version, and then left-click on it.
• Arrange for the startup type to be set to Automatic.
• When the Service status is displayed as Stopped, click on Start.
• In the Recovery tab, set First failure, Second failure, and Subsequent failures to Restart the Service.
• Click Apply and then click OK.
• Carry out steps 2 to 6 for the QBCFMonitorService.

If the service fails to start, reinstall QuickBooks Database Server Manager from the Tool Hub as stated in Solution 1, then make sure your firewall permits QBDBMgrN.exe as explained in Solution 5; after the service is running, run a new folder scan and test multi-user access from a workstation.

If the service fails to start, reinstall the QuickBooks Database Server Manager from the Tool Hub as outlined in Solution 1 and then make sure that your firewall permits QBDBMgrN.exe as stated in Solution 5; after the service has been running without interruption, carry out a new folder scan and test multi-user access from a workstation.

QuickBooks File Doctor Not Opening? Here’s What You Can Try

If QuickBooks File Doctor not opening is the problem, you cannot complete Solution 3, so it is worth fixing first. The tool usually fails to launch for one of three reasons: an outdated or conflicting Tool Hub installation, missing administrator rights, or missing .NET Framework components.

Try these steps in order:

• Close QuickBooks and the Tool Hub, then restart the computer.
• Right-click the QuickBooks Tool Hub icon, select Run as administrator, and open Company File Issues again.
• If the tool still does not open, uninstall the Tool Hub. On Windows 11, go to Settings > Apps > Installed apps. On Windows 10, go to Control Panel > Programs and Features.
• Download the latest Tool Hub from Intuit and install it. Newer releases include fixes that keep File Doctor from stalling.
• Confirm that Microsoft .NET Framework is installed and up to date. If it is damaged, repair it from Control Panel > Programs and Features, or ask your IT contact to do so.
• As a last option, open the Start menu, search for QuickBooks File Doctor, and launch it directly.

Once the File Doctor opens, be patient. The scan can take 10 to 15 minutes, and it might report an unsuccessful result even after fixing the underlying problem. Test multi-user access before you restart the scan so you don’t repeat work unnecessarily.

How to Verify Hosting Mode is Working: Key Points

Before you close the case, confirm that everything is set up correctly. Here is how you can know for sure that hosting mode is working.

• On the server, File > Utilities shows Stop Hosting Multi-User Access
• On every workstation, File > Utilities shows Host Multi-User Access.
• QuickBooksDBXX and QBCFMonitorService show a status of Running in services.msc.
• The Database Server Manager scan lists your company folder.
• A workstation opens the company file in multi-user mode without any H-series error.
• Two users can work in the file at the same time without interruption.

Wrapping Up

If you find that QuickBooks Hosting Mode is off, it might be disruptive, but the solution is usually very simple. Begin with the short guide available on the server, and then proceed step by step through Database Server Manager, the .ND and .TLG files, File Doctor, permissions, firewall exceptions, and network checks. As you are doing this, keep in mind that QBDBMgrN must be running and that only a single computer should be hosting.

If you’ve gone through all the steps and multi-user access still isn’t working, you don’t need to keep troubleshooting on your own. You can call a QuickBooks professional at +1-866-513-4656, who can then review your setup with you.

Alternatively, you can consult our guide to troubleshoot QuickBooks error H202 or these problems if the workstation can’t communicate with the server.

About The Author

Meghan McKenzie, CPA, is a senior accounting technology writer with over a decade of experience helping US small businesses streamline their financial operations. She specializes in resolving complex accounting software errors, automating workflows, and translating technical tax and bookkeeping standards into practical advice.