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QuickBooks Error H303" happens when a company file can't be read in multi-user mode because it needs more settings. Usually, faulty hosting settings or firewall problems are the source of this error. In order to fix it, you must confirm that the server is configured for hosting and modify network settings to guarantee seamless access. Give us a call at
+1.833.802.0002 if you would like to talk with a QuickBooks support specialist right away.