A Swift Solution For Resolving QuickBooks Error H303
                     Effective Methods To 
Eliminate QuickBooks Error 
H303
QuickBooks allows its users to connect multiple systems and work on the same piece of 
data. However, users fail to utilize the multi-user network once QuickBooks Error H303 
emerges while switching the server computer to multi-user mode. In case you also run into 
this multi-user error on your QuickBooks, keep reading the blog further to understand why it 
occurs and the steps to remove it from your PC.
​Approach​our​team​of​QB​experts​at​+1-855-856-0042​​for​troubleshooting​directions​
to​remove​the​error.

Reasons
Once your QB gets infected with this error, you won’t be able to switch the server 
computer to multi-user mode and host the company file on it. The primary causes of this 
error interrupting the multi-user network are discussed below-
• The Network Descriptor is damaged, and the DBSM fails to run it while setting up the 
multi-user network.
• Database Server Manager files or processes are blocked by the Windows Firewall or 
an antivirus.
• The company file is already opened by another user in single-user mode.
Solutions
The multi-user network won’t establish in QB successfully after this error emerges and 
forbids the server from using the multi-user mode. The practical solutions for this multi-user 
mode issue are mentioned below-
Solution 1- Arrange the hosting setting correctly on the server and 
workstations
QuickBooks can only share the company file data smoothly if the server computer runs in 
multi-user mode and all the workstations use the single-user mode. If this isn’t the setup on 
your QuickBooks, the DBSM fails to run, and you cannot host the company file on the 
server. You must apply the following steps to adjust the QBDT hosting settings on your PC-
• Run QuickBooks on the system where this error emerged and click the File menu.
• Select the Utilities option and tap Stop hosting multi-user access.
• Apply these steps on all the workstations to ensure they all run in single-user mode.
• Launch QB on your server computer and go to the File menu.
• Click Utilities and tap the Host multi-user access option.
• Restart all the computers and host the company file on the server again.
Move to the next solution if the error appears again while hosting the company file.
Solution 2- Fix the Network Descriptor file before running it in DBSM
The network descriptor file contains info about the data source in the network and the 
path to all the workstations. Database Server Manager falls prey to issues if the .nd file 
gets damaged and fails to run. Refer to these steps-
• Go to the QB folder and right-click the .nd file inside.
• Tap the Rename option and type ‘.old’ as an extension to the file name.
• Launch the Database Server Manager after saving the file and move to the Scan 
Folders tab.
• Tap Browse and select the QB folder where you renamed the network descriptor file.
• Click Start Scan and wait until the scan is complete in DBSM.
 Conclusion
We are now at the end of the blog explaining why QuickBooks​Error​H303 doesn’t let the 
server computer use the multi-user mode. The methods to rectify the error are given in the 
blog, which you must apply to resolve the multi-user mode issue in your QuickBooks. 
Speak directly to our team of QB experts at +1-855-856-0042 if you still have remaining 
queries about the issue.