What is EDI onboarding?

EDI refers to the systems and standards for electronically (and often automatically) transmitting business data and documents in real-time, including invoices, purchase orders and supply chain information, between trading partners.

In EDI transactions, information moves directly from an EDI application in one organization to an EDI application in another. EDI standards define the location and order of information in each document. 

EDI solutions offer many benefits through automation, scalability and standardization, and EDI has been the preferred means of document exchange for business-to-business (B2B) interactions for decades. Notably, automatically generated, standardized forms streamline and reduce or eliminate the need to manually enter data, reducing errors and the associated costs.  

For some businesses, and in some industries, using EDI isn’t a choice, but a necessity. Many large retailers and manufacturers have EDI requirements and compliance for business processes.

Requirement variability can exist between trading partners, such as differences in compliance regulations, document-mapping requirements, communication protocols or testing processes. This combined with the general complexity of EDI standards can make EDI onboarding a difficult and time-consuming process. 

However, standardized, well-documented internal onboarding processes, appropriate middleware tooling and clear communication with business partners can mitigate EDI setup challenges. They also help organizations reap the benefits of EDI, including greater data accuracy and the ability to transact with businesses that require EDI compliance.

By integrating EDI platforms with other internal enterprise systems, such as enterprise resource planning (ERP) platforms, organizations can build automated pipelines. These pipelines can both transmit standardized business data to partners and sync internal systems with an EDI platform.

This integration “completes the pipeline,” enabling the automatic flow of data, not only between partners on EDI software, but from a business partner to an organization’s back-end application and business systems. Once integrated, an EDI application can extract data from an internal platform (like an ERP system), convert this information into a standardized EDI format, and securely transmit the file to a trading partner. This automated integration further reduces manual data entry by eliminating the need to rekey data from an internal platform into an EDI platform.

EDI onboarding can refer to the setup of an EDI platform alone, or both the platform’s configuration and its integration with internal enterprise systems. Given the importance of integrated systems in modern IT environments, it’s usually the latter.

Onboarding will look different across individual cases, but the following steps are important components of most onboarding processes.

In the first step of onboarding, the prospective new trading partners must confer and agree on the technological basics of how an EDI connection could work. This agreement is typically expressed through a trading partner agreement, or TPA. TPAs are contracts that lay out the full scope of the EDI exchange in question between EDI trading partners. A TPA includes both document type and standards, but also liability terms, compliance rules, length of contract, communication protocols and more. This kind of pre-setup negotiation for partner onboarding sets the stage for the rest of the onboarding cycle.

Key points to consider include:

The nature of the documents involved dictates many subsequent steps in the EDI onboarding process; some industries or business locations might require different standards or different security measures. The most common documents exchanged over EDI include an 850 Purchase Order, an 810 Invoice and a 997 Functional Acknowledgment.

Standardization is a major component of EDI, but there are multiple standards for different purposes. Common standards include ANSI ASC X12 (sometimes called X12), which is most common in North America. HIPAA mandates a specific version of that standard for health care transactions and medical information. EDIFACT is a common international standard developed by the UN.

The second step of EDI onboarding involves the exchange of tech specs; essentially, this is a discussion and agreement of the precise way in which documents will be exchanged. 

There are several different communication protocols that can be used to transmit documents according to EDI principles. These include:

• AS2 (Applicability Statement 2): A common protocol that supports HIPAA compliance as well as features such as digital signatures and delivery notifications.
  
  
• SFTP (Secure File Transfer Protocol): An older protocol, minimal and simple to use but lacking some advanced features found in AS2.
  
  
• MFT (Managed File Transfer): An evolution of FTP (File Transfer Protocol) with more modern features including end-to-end encryption and audit trails.
  
  
• SOAP (Simple Object Access Protocol): Platform-agnostic XML-based messaging system, sometimes found in legacy EDI systems.

An EDI implementation guide is a document that defines many of the technical aspects of the data exchange. An implementation guide often includes everything that we’ve discussed so far, including protocol, document types, and standards.

But an implementation guide also digs deeper into the documents themselves, defining which fields must be filled out in each document type, ID codes for each exchange to identify sender and receiver and other partner-specific rules. Implementation guides are common and useful for large organizations with high transaction volume, as any confusion or error can cause significant disruption.

Now that all the specs and contracts have been ironed out, the next step involves setting up the infrastructure for an EDI exchange.

Building an EDI interface from scratch is possible, but it’s more common for organizations to use a prebuilt platform. Modern EDI provider platforms often include integrations for other internal enterprise platforms, such as ERP (enterprise resource planning) platforms and WMS (warehouse management systems) to reduce the need for manual data entry between systems. For small businesses, cloud-based web portals offer a low cost of entry and basic features for efficient EDI use, such as ERP integrations. Many of these solutions are increasingly incorporating AI tools for more advanced validation and compliance checks.

Larger organizations might need more customer service and attention; managed EDI services offer mapping, testing, support and more, albeit at a higher price than web EDI portals, but with enhanced operational efficiency.

Mapping can be the step that brings the most friction. Essentially, data mapping is the process of translating internal data, which might be in XML, CSV or any other format, into one of the standardized EDI formats, like X12.

Most EDI platforms including mapping functionality, often with a drag-and-drop interface to handle the translation of data flows. There is also standalone EDI mapping software that can provide more granular control over the process. This process can get very granular and finicky; each individual EDI data field needs to be mapped according to the implementation guide.

For example, a supplier might use an internal part number, but sell that part to a retailer who uses a SKU. In that case, there needs to be a cross-reference table that notes that the part number is the same item as the SKU. Other issues with mapping might include fields that are used by a supplier but not by a customer, such as “department” or “warehouse aisle.” Information like this can cause validation failure, as it doesn’t match and might need to be labeled as conditional or optional.

Many organizations, such as big-box retailers, offer a library of pre-built mapping templates to attempt to make this process a little easier. Other organizations might opt to hire a third-party contractor to set up the map.

EDI is notoriously finicky, with high rates of non-compliance errors, according to an analysis from Long View Systems. When errors occur while implementing EDI, there can be cascading effects down the supply and commerce chain. This is why testing is such a vital step in a successful onboarding process.

The connectivity testing step aims to ensure that one system can communicate with another. Typically, this is accomplished with a simple “TEST” message, which should return an MDN, or Message Disposition Notification (an automated receipt response). 

This step checks that the EDI files are structured correctly, in accordance with the EDI format standard and the implementation guide. There are multiple elements included in EDI validation. 

The most basic is perhaps syntax validation. Are all the required fields filled out? Are those fields in the right order? Are they filled out in accordance with its data type (so, for example, a date is written as YYYYMMDD rather than “March 18, 2026”)? 

Another validation category is code set validation. Do codes, such as country codes or currency codes, match accepted official lists? 

Sending a dummy document is an important step to ensure that documents are transmitted and received appropriately. Teams on both sides of the transaction can analyze any accompanying error messages and see what went wrong. Common issues include incorrect code values, formatting errors and incomplete mandatory fields. 

After a single transaction works properly, it’s time for the end-to-end testing of the entire process. This step involves ensuring that integration with an ERP or other platform works without errors, that each sent transaction returns a 997 (functional acknowledgment form), and that each step follows from the previous. These workflows can be multi-stage: does the presence of a purchase order trigger the sending of an invoice order? 

After testing is complete and each trading partner acknowledges that the system is ready to launch, the platform is set to go live. This might mean adjusting the EDI platform so that it moves from a test environment to a production environment, which can be done in stages or all at once. 

During the early period of a live EDI launch, it’s common to pay special attention to each transaction to ensure that all is operating as it should. Manual verification is common for these early transactions, checking to ensure that nothing unexpected and no errors pop up. 

During the full lifecycle of EDI, one partner might decide to change the implementation guide. For example, new items could be added, new product types or new fields. These must in turn be validated and tested. EDI is automated but not fixed—updates can be implemented when needed. 

The process of onboarding EDI is complex and fraught with opportunities to introduce errors and frustrations. Common pitfalls include