The algorithm progressively incremented the port assignments within a wide-range of available ports Microsoft defined for the Windows firewall.
For example, in 2018 the following ports had to be open for QuickBooks to work properly in multi-user mode: 8019, 56728, 55378-55382 whether you were using a client-server or peer-to-peer network configuration.
In some prior years, there have been port conflicts between QuickBooks and certain Microsoft Operating System components, most notedly Microsoft DNS, which is a Windows Server-related 'Windows service.' But even when Microsoft OS components were not the source of conflict, other programs and services running on the computer hosting QuickBooks could interfere with the QuickBooks network operations by making use of some, or all, of the firewall ports. In severe cases the conflict could even keep the QuickBooks Database Server (a windows service) from starting-up after a controlled, or unexpected shut-down of the computer hosting QuickBooks. #Reset next check number in quickbooks 2018 desktop windows
To reduce the potential of conflicts of this type, and the associated multi-user networking operations of QuickBooks Desktop, Intuit has changed the way that it allocates firewall ports for the 2019 Desktop QuickBooks products. #Reset next check number in quickbooks 2018 desktop windows.
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