Incoming Routing Methods (Microsoft Fax): E-mail, Store in Folder, Print, Custom

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Fax Voip implements Fax Voip Routing Extension that is integrated into the Windows Fax Service. When the fax service receives a fax transmission, it routes the received document through each of the fax routing methods defined by a fax routing extension.

When receiving faxes using Microsoft Fax* application (via Fax Voip Virtual COM Ports), you can configure Incoming Routing Methods to route incoming faxes to recipients on the network. Depending on the Caller Number (Caller ID) and Called Number (DID), different actions can be applied to incoming fax. These actions are defined by the so-called rules. The independent set of rules is used for each method.

The fax routing methods defined by the Fax Voip Routing Extension are very similar to the fax routing methods defined by the Microsoft Routing Extension (available on any Windows Server computer, such as Windows Server 2019, Windows Server 2016, Windows Server 2012R2 etc.). The essential difference is the possibility to do routing based on Called Number (DID) and without being tied to a specific modem device. This was made possible by implementing the workaround that is described in the Caller ID settings (Incoming Modem Calls) chapter of this user manual. In addition, Fax Voip routing methods work not only on Windows Server computers, but also on any workstation, such as Windows 10, Windows 8.1 etc.

The Fax Voip Routing Extension includes the following Incoming Routing Methods that can be configured in the Fax Voip Control Panel:

Route through e-mail

Incoming faxes can be delivered via e-mail to one or more e-mail recipients.

Store in a folder

Incoming faxes can be copied to one or more local or network folder.


This method allows to automatically print Incoming faxes.


This method allows to easy add any routing functionality by using custom application that is started after receiving a fax. The using of this method is not limited by the current licences.

Incoming Methods (Microsoft Fax) page contains the following information:

Incoming Method

The Incoming Routing Method name

Max # of Rules

Total number of rules, that can be used. It is usually the sum of Basic and Additional number of rules.


Basic number of rules, that can be used. Specified as the number of Virtual COM Ports (modems) + 1. The TRIAL version allows the use of no more than 2 rules of every type.


Additional number of rules, defined by the Fax Voip Extended Fax Routing (E-mail, Store in Folder, Print, Fax-On-Demand) license.

The following commands are available in the Incoming Methods Contextual Tab of the Ribbon:

Incoming Methods (Microsoft Fax)

Route through e-mail

Click to configure Route through e-mail (Microsoft Fax) rules for incoming faxes.

Store in a folder

Click to configure Store in a folder (Microsoft Fax) rules for incoming faxes.


Click to configure Print (Microsoft Fax) rules for incoming faxes.


Click to configure custom routing for incoming faxes (Microsoft Fax).

Alternatively, you can double-click a method in the Incoming Methods (Microsoft Fax) list, or select Edit command from the context menu.

The following diagram provides an overview of the incoming fax routing process:

On Windows Server computer, you can view Fax Voip Routing Extension fax routing methods in the Microsoft Fax Service Manager, see picture below.

When configuring Fax Voip Routing Extension fax routing methods, please take note of the following:

To view Fax Voip Routing Extension log, use Enable Fax Voip Routing Extension debug logging option, see more details in the Incoming Routing Methods (Microsoft Fax) Logs chapter of this user manual. To view detailed logs for fax routing methods, use other options described in the same chapter.