Here Is a Simple Guide To Fix QuickBooks error H303
                     Relevant methods 
to tackle 
QuickBooks error 
H303
QuickBooks allows users to set up a multi-user network for sharing business data and 
updating it simultaneously using multiple systems. The network can sometimes fall 
prey to issues that lock users out of their data. Users face trouble switching to multi-
user mode after QuickBooks error H303 emerges while hosting a company file. You 
also face problems working on your company file due to this issue, explore this blog 
to find the reasons it happens and the techniques effective against it.
Feel free to approach a QB support team at 1-855-856-0042 for troubleshooting 
guidance to resolve the issue.

Reasons
You might encounter this error while accessing your QBDT data file from different 
systems/ workstations. The possible reasons your accounting software runs into this 
hosting error are mentioned below-
• You tried setting up the network with one or multiple workstations running in multi-
user mode.
• A user connected to the network has already occupied the data in single-user mode.
• Database Server Manager crashing in the background while hosting the company 
file leads to the failure of the multi-user network.
Solutions
You’ll face problems opening the company file or hosting it to create a multi-user network 
after QBDT gets influenced by this error. You can apply the following techniques on your 
PC to get rid of this multi-user mode-
Solution 1- Set up the multi-user network hosting settings 
correctly on your QuickBooks
The primary causes of this multi-user mode error can be workstations running in multi-
user mode or the file getting occupied by a user in single-user mode. These cause the 
Database Server Manager to crash in the background or the data file to become 
inaccessible to all the other systems, including the server. You need to ensure that only 
the server is solely allowed to use the multi-user mode to host the company file. Use the 
steps mentioned below to fix the QBDT hosting settings on your device-
• Go to all the workstations in your organization individually and launch QBDT.
• Open the File menu at the top and select Utilities in the drop-down options list.
• Tap Stop Hosting multi user access to switch the software to single-user mode
After configuring all the workstation settings, approach the server computer to 
access the File menu.
• Click the Utilities option and tap Host multi-user access.
• Reboot all the systems (Server & Workstations) and try hosting the company file on 
the server computer again.
If the error pops up again while opening/hosting the company file, jump to the next 
solution.
Solution 2- Restart the QBDT Database Server Manager 
processes
You can also face trouble running a company file if the Database Server Manager stops 
running in the background. This can happen due to minor glitches in your system, which 
interrupt DBSM processes in the background. Use the following steps to restart the 
DBSM processes in the background-
• Press the Ctrl+Shift+Esc keys together to open the task manager.
• Search QuickBooksDBSM.exe under the Processes tab and single-click on it.
• Hit End Task to restart the process when you start QBDT again.
Conclusion
We have reached the finishing of this blog describing the reasons 
QuickBooks error H303 stops you from using the multi-user mode. A few techniques are 
also discussed in the blog, and we expect you apply them to rectify the problem in your 
QBDT.