What causes QuickBooks Error H202?

H202 means the workstation copy of QuickBooks can't reach the company file on the server in multi-user mode. Common causes are QuickBooks Database Server Manager not running, blocked ports (8019, 55378-55382), incorrect hosting settings, or DNS/hostname issues between the workstation and server.

Is H202 a data file corruption error?

No. H202 is strictly a networking / hosting issue. Your company file is fine — the workstation just can't reach it in multi-user mode.

Should hosting be turned on for workstations?

No. In a proper multi-user setup, only the server hosts the file. Workstations must have hosting turned OFF (File → Utilities → Stop Hosting Multi-User Access). Multiple hosts are a top cause of H202.

Which ports does QuickBooks need open?

TCP ports 8019, 56728, 55378-55382 for recent QuickBooks Desktop versions. Add QBW32.exe and QBDBMgrN.exe as firewall exceptions on the server.

Fix QuickBooks Error H202 — Multi-User Mode

Why H202 Happens

QuickBooks Database Server Manager is stopped on the server
Firewall is blocking QuickBooks ports (8019, 56728, 55378-55382)
Hosting is enabled on a workstation instead of only on the server
The workstation can't resolve the server hostname
The .ND (network descriptor) file is stale or missing

Verify Hosting Settings

On every workstation open QuickBooks and go to File → Utilities. You should see Host Multi-User Access. If you see Stop Hosting Multi-User Access, click it — the workstation should not be a host.

On the server, the option should read Stop Hosting Multi-User Access, meaning hosting is on.

Run QuickBooks Database Server Manager

On the server, open QuickBooks Database Server Manager, add the folder containing the company file, and click Scan. This rebuilds the .ND file and restarts the QuickBooksDBXX service.

Use QuickBooks Tool Hub → File Doctor

Install QuickBooks Tool Hub on the server
Open Company File Issues → Run QuickBooks File Doctor
Select the company file and choose Check your file and network
Let it finish, then reopen the file from a workstation in multi-user mode

Open the Required Firewall Ports

On the server, add these ports as inbound TCP exceptions in Windows Defender Firewall:

QuickBooks 2020 and later: 8019, XXXXX (dynamic — use QuickBooks Database Server Manager's Port Monitor tab)
Executables to allow: QBW32.exe, QBDBMgrN.exe, QBCFMonitorService.exe, AutoBackupExe.exe

Restart the server after adding the rules.

Add the Server to the Workstation's Hosts File

If the workstation can't resolve the server by name, open C:\Windows\System32\drivers\etc\hosts as administrator and add a line mapping the server's IP to its hostname:

192.168.1.10    QB-SERVER

Save the file and reopen the company file in multi-user mode.

Still Getting H202?

H202 that survives all five fixes usually means the .ND file is locked, a domain group policy is blocking QuickBooks, or the Database Server Manager service crashed. Our techs can log in, diagnose the layer that's failing, and restore multi-user access — call for same-day help.

Call +1 800-209-8240 Request a callback

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