---
title: "Document Automation Server configuration guide"
canonical_url: "https://www.nutrient.io/guides/document-automation-server/document-conversion/autobahn-dx-configuration-files/"
md_url: "https://www.nutrient.io/guides/document-automation-server/document-conversion/autobahn-dx-configuration-files.md"
last_updated: "2026-05-23T00:08:18.011Z"
description: "Learn about key configuration files for Document Automation Server, including their settings and functionalities for optimal performance."
---

# Essential configuration files for Document Automation Server

This section lists the different configuration files we have in Nutrient Document Automation Server (DAS), along with their uses.

## Autobahn.config

The Nutrient DAS configuration file `Autobahn.config` can be found in the `config` directory of Nutrient DAS. This file allows the user to make some backend changes to the way Nutrient DAS works. Below are the contents of the file.

We strongly advise users not to change any undocumented settings.

These settings are important for Nutrient DAS to function properly and should never be changed unless guided by the Nutrient support team.

```xml

<configuration\>

<appSettings file="">

<clear />

<add key="inputdelay" value="10" />

<add key="jobqueuetimeout" value="180" />

<add key="jobqueueinterval" value="10" />

<add key="mergeflag" value="" />

<add key="trigger1001" value="" />

<add key="triggerlevel" value="" />

<add key="allowlongfilename" value="" />

</appSettings\>

</configuration\>

```

### The input delay

This in an integer value that represents the number of seconds a file must exist in the input folder before Nutrient DAS attempts to process it. The default value is `0`; to change this, update the value of the `inputdelay` key:

`<add key="inputdelay" value="10" />`

The value is in seconds.

### Multicore throttle settings

Refer to the guide on [multicore throttling](https://www.nutrient.io/guides/document-automation-server/document-conversion/multicore-support.md#multicore-throttling) for more information:

```xml

<add key="jobqueuetimeout" value="180" />

<add key="jobqueueinterval" value="10"/>

```

The value of `jobqueuetimeout` is in seconds.

### Output trigger files

This feature makes Nutrient DAS copy a file (trigger file) to the output folder after the job completes and successfully copies the processed files to the output folder. This file can be used to trigger a post-processing workflow.

The keys below can be used to control the way this feature acts.

| Setting name         | Details                                                                                                                                                                                                                                                                                      |
| -------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **`trigger%JOBID%`** | When you add a value to this key, Nutrient DAS will create a file with the name of the value in the output folder of the job with `ID = %JOBID%`.
 To send a trigger file for a job with job ID 1002, use `trigger1002` as the key.                                                 |
| **`triggerlevel`**   | This specifies if the trigger file should be copied to the top-level folder only or also the subfolders.
 The possible values are:

- **sub** — Copies the file to the top-level folder and the subfolders.

- **top** — Copies the file to the top-level folder only. |

The setting below will copy `test.csv` to the top-level output folder of a job with job ID 1001:

```xml

<add key="trigger1001" value="test.csv" />

<add key="triggerlevel" value="top" />

```

### The merge flag feature

This feature is used to give the user a certain level of control over which folders to be included in the merge operations (e.g. Merge Tiffs, Merge PDF, Merge Tiffs to PDF, and Extended Merge Tiffs to PDF). It provides the user with a mechanism of flagging folders to include for processing.

To use this feature, follow the steps below:

- Choose a name you want to set as the flag name. For instance, `_ready`.

- Open the `Autobahn.config` file located at `<InstallDirectory>\Autobahn DX\config\`.

- Change the value of `<add key="mergeflag" value="" />` to `<add key="mergeflag" value="ready.adx.merge" />`.

The file extension must be `.adx.merge` for this to work.

- Next, create the zero-size byte file named `_ready.adx.merge`, and copy and paste in each folder that requires processing.

- Restart the service to load the new configuration.

Restarting the service will cause all jobs that are running through the job manager to terminate.

### Allow long file names

Starting in Windows 10 and Windows Server 2016, version 1607, `MAX_PATH` limitations have been removed from common Win32 file and directory functions. However, you must opt in to the new behavior. Refer to the [file name length](https://www.nutrient.io/guides/document-automation-server/document-conversion/file-name-length.md) guide for more details on how to enable this setting.

After enabling support for long file names in the registry, set the value of the `allowlongfilename` key to `true`.

#### Allow users to disable SSL in email steps

SSL is a security feature that helps establish secure connections when sending emails. However, sometimes emails are only sent internally, in which case an SSL certificate may not be required (or available).

Though we recommend keeping SSL enabled in most cases, it can now be disabled by setting the **secureoption** configuration option to **None**. It’s set to **Auto** by default.

`<add key="secureoption" value="Auto" />`

| Setting name     | Values                                                                                                                                                                                                                                                                                                                                                                         |
| ---------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| **secureoption** | - **None** — Disable SSL certificate requirement when sending emails

- **Auto** — Use default settings

- **StartTls** — StartTLS informs the email server that the email client wants to upgrade from an insecure connection to a secure one using TLS or SSL.

- **SslOnConnect** — The email connection should use SSL or TLS encryption immediately. |

## tiffjunction.exe.config

The TIFF Junction configuration file `tiffjunction.exe.config` can be found in the `distribution\tj\bin` directory of Nutrient DAS. It allows the user to make some backend changes to the way TIFF Junction works. Below are the contents of the file:

```xml

<?xml version="1.0"?>

<configuration>

<appSettings>

<add key="DetailedValidation" value="false" />

<add key="CompatabilityMode" value="false" />

<add key="DateFormat" value="MM dd yyyy" />

<add key="AllowErrorTiffFiles" value="false" />

<add key="UseLibTiff4JPEG" value="false" />

<add key="OrderByInt" value="false" />

<add key="ConvertToTIFFThreshold" value="50" />

<!--Extensions in lower case -->

<add key="AcceptedImages" value=".jpeg,.png,.bmp,.wbmp,.tif…" />

</appSettings>

</configuration>

```

It’s important to pay attention to the element within the `appSettings` tags. The table below gives a more detailed explanation of each setting.

| Setting name                                                                             | Details                                                                                                                                                                              |
| ---------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| **DetailedValidation**                                                                   | Set this to `true` if you want TIFF Junction to carry out extra checks and validations, like PDF/A validation after conversion. Setting it to `true` will make TIFF Junction slower. |
| **CompatabilityMode**                                                                    | Set this to `true` if the arguments you’re using to call `tiffjunction` were generated before 2015.                                                                                  |
| **DateFormat**                                                                           | You can change the DateFormat of the output file names here. This works in conjunction with the `%DATESTAMP%`.                                                                       |
| **AcceptedImages**                                                                       | TIFF Junction will treat any extension found here as an acceptable image file.                                                                                                       |
| **OrderByInt**                                                                           | When merging files with numbers as their file name, setting this to `true` will make sure they’re ordered numerically.                                                               |
| **AllowErrorTiffFiles**
 **UseLibTiff4JPEG**
 **ConvertToTIFFThreshold** | Only use these settings when advised by our [Support team](mailto:support@nutrient.io).                                                                                              |

## pj.exe.config

The PDF Junction configuration file `pj.exe.config` can be found in the `distribution\pj\bin` directory of Nutrient DAS. This file allows the user to make some backend changes to the way PDF Junction works. Below are the contents of the file:

```xml

<?xml version="1.0"?>

<configuration>

<startup useLegacyV2RuntimeActivationPolicy="true">

</startup>

<appSettings>

<add key="OrderByInt" value="true"/>

<add key="ValidatePDFa" value="true"/>

<add key="RemoveDuplicateFontFiles" value="true"/>

<add key="DateFormat" value="MM dd yyyy"/>

<add key="DateFormat" value="MM dd yyyy" />

</appSettings>

</configuration>

```

Pay attention to the element within the `appSettings` tags. The table below gives a more detailed explanation of what each setting.

| Setting name                 | Details                                                                                                                                                                                                                                           |
| ---------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **ValidatePDFa**             | Set this to `true` if you want PDF Junction to validate PDF/A files after conversion.                                                                                                                                                             |
| **DateFormat**               | You can change the DateFormat of the output file names here. This works in conjunction with the `%DATESTAMP%`.                                                                                                                                    |
| **RemoveDuplicateFontFiles** | When merging PDFs with embedded fonts, this option will ensure there are no duplicate font files in the target file. Setting this to `false` can cause very large output PDF files, while setting it to `true` might slow down the process a bit. |
| **OrderByInt**               | When merging files with numbers as their file name, setting this to `true` will ensure they’re ordered numerically.                                                                                                                               |

## Other configuration files

| File name                           | Location              | Comment                                                                          |
| ----------------------------------- | --------------------- | -------------------------------------------------------------------------------- |
| `topdf.exe.config`                  | `distribution\pj\bin` | Refer to the [in-depth look at the configuration file](https://www.nutrient.io/guides/document-automation-server/document-conversion/topdf-bcl-easypdf.md#in-depth-look-at-the-configuration-file) guide for more details. |
| `AnyFileToSearchablePDF.exe.config` | bin                   | Chooses the operation for `anyfiletopdf` job steps based on the file extension.  |
---

## Related pages

- [Comprehensive guide to document automation servers](/guides/document-automation-server/document-conversion/acknowledgments.md)
- [Explore document automation server directories](/guides/document-automation-server/document-conversion/autobahn-dx-directories.md)
- [Efficiently execute jobs with the DAS .NET API](/guides/document-automation-server/document-conversion/autobahn-dx-net-api.md)
- [Streamline your document processing jobs](/guides/document-automation-server/document-conversion/autobahn-dx-quick-start.md)
- [Streamline PDF management with advanced automation](/guides/document-automation-server/document-conversion/dascontentextraction-kingfisher-job-step.md)
- [Split and rename PDF files using barcode detection](/guides/document-automation-server/document-conversion/barcode-support.md)
- [Optimizing load balancing with distributed polling](/guides/document-automation-server/document-conversion/distributed-polling.md)
- [Enhanced cloud OCR capabilities for text recognition](/guides/document-automation-server/document-conversion/cloud-ocr.md)
- [Enhance document processing with the .NET SDK](/guides/document-automation-server/document-conversion/gdpicture-additional-steps.md)
- [Streamline your document conversion processes](/guides/document-automation-server/document-conversion.md)
- [Managing Windows file name length in DAS](/guides/document-automation-server/document-conversion/file-name-length.md)
- [Essential document automation server installation guide](/guides/document-automation-server/document-conversion/installation-and-licensing.md)
- [Enhance document processing with multicore support](/guides/document-automation-server/document-conversion/multicore-support.md)
- [Streamline document automation with XML job definitions](/guides/document-automation-server/document-conversion/job-definition-xml-files.md)
- [Extract key-value pairs from PDFs to JSON](/guides/document-automation-server/document-conversion/pdf-recognition-to-json-job-step.md)
- [Optimize OCR with advanced preprocessing options](/guides/document-automation-server/document-conversion/ocr-properties-file-and-the-advanced-pre-processing-option.md)
- [Streamline document processing with automation](/guides/document-automation-server/document-conversion/product-overview-and-concepts.md)
- [Automate document processing with custom scripts](/guides/document-automation-server/document-conversion/scripting-custom-steps.md)
- [Effortlessly convert files to PDF with ToPDF](/guides/document-automation-server/document-conversion/topdf-bcl-easypdf.md)
- [Upgrade Document Automation Server](/guides/document-automation-server/document-conversion/release-notes.md)