What Is CDW EDI? A Beginner’s Guide for New Vendors

If you’re a new CDW vendor, you’ve probably already heard this line:

“You’ll need to be EDI-enabled to ship to CDW.”

That sounds simple enough until you start seeing terms like CDW EDI, 850, 856, 810, AS2, and GS1 labels. Suddenly, what should be a growth opportunity starts to feel like a technical maze.

This beginner’s guide explains what CDW EDI is, which EDI documents CDW expects from new suppliers, and how to get compliant without building an internal EDI team from scratch. We’ll walk through the core 850 / 855 / 856 / 810 flow, common mistakes new vendors make, and how a modern platform like ActionEDI can help you go live faster.

By the end, you’ll know exactly how to move from “CDW EDI sounds scary” to “Our CDW EDI integration is live and stable.”

What Is CDW EDI?

CDW EDI is the way CDW exchanges business documents electronically with its vendors and partners. Instead of emailing PDFs or entering orders manually into portals, CDW sends and receives data using Electronic Data Interchange (EDI) standards.

In practical terms, CDW EDI means:

• CDW sends you purchase orders (EDI 850).
• You send back purchase order acknowledgements (EDI 855) where required.
• You send advanced shipping notices (EDI 856) with carton and tracking details.
• You send invoices (EDI 810) so CDW can pay you.

All of this flows system-to-system, following CDW’s specific mapping rules, communication methods, and validation requirements. If you’d like a broader primer on EDI itself, you can also read our guide What Is EDI?

Who Needs CDW EDI?

If you’re selling hardware, software, or peripherals through CDW at any meaningful scale, you’ll eventually be required to support CDW EDI integration. Manual keying and one-off spreadsheets don’t scale when you’re shipping dozens or hundreds of orders each week.

Typical vendors that need CDW EDI include:

• Hardware and device manufacturers and distributors
• Software and SaaS vendors
• Peripherals and accessories suppliers
• Specialty and niche technology brands growing via CDW

If CDW has already told you that you must become “EDI-enabled,” this guide is your starting point.

CDW EDI in Plain English

Before we go into the details, let’s simplify the terminology CDW uses with suppliers.

What is EDI?

Electronic Data Interchange (EDI) is a standard way for computers to exchange business documents (orders, invoices, shipping notices, etc.) without manual data entry. Instead of a human reading a purchase order and retyping it into your ERP, your system receives and processes the data automatically.

Think of it as the common language both your system and CDW’s systems speak so they can trade information quickly and accurately.

What makes CDW EDI “special”?

Every retailer or distributor has its own EDI “rulebook.” CDW EDI is simply EDI that follows CDW’s:

• Transaction set requirements (which document types are mandatory)
• Data rules (what fields must be sent and how)
• Communication methods (AS2, SFTP, FTP with encryption, etc.)
• Service-level expectations (timing for ASNs, invoices, acknowledgements)

Get those right, and your CDW relationship is smooth. Get them wrong, and you face delays, chargebacks, and frustrated teams on both sides.

The Core CDW EDI Documents New Vendors Need to Support

There are dozens of possible EDI transaction types. As a new CDW vendor, you typically start with a core set that covers the order-to-cash flow. These transaction sets are the backbone of your CDW EDI setup.

1. EDI 850 – CDW Purchase Order

The EDI 850 Purchase Order is the starting point. CDW sends this document to tell you:

• Which items they’re buying
• Quantities and prices
• Ship-to locations and requested ship dates
• Any special instructions or contract references

Your system needs to be able to receive and interpret the 850, transform it into an order in your ERP or order management system, and trigger downstream processes like picking, packing, and shipping.

2. EDI 855 – Purchase Order Acknowledgement

The EDI 855 Purchase Order Acknowledgement is your way of telling CDW what you can fulfill. Depending on CDW’s setup and your category, you may need to:

• Accept the order as-is
• Reject specific lines or the full order
• Propose changes (e.g., ship dates, quantities, or alternates)

CDW uses this document to keep their own availability and delivery expectations accurate for their customers.

3. EDI 856 – Advanced Shipping Notice (ASN)

The EDI 856 ASN describes how the order is being shipped. It usually includes:

• Ship date and estimated arrival
• Carrier and tracking numbers
• Packing structure (cartons, pallets)
• Item-level details tied to each carton

This ASN is often linked to GS1/UCC-128 shipping labels on each carton, so CDW’s warehouses can scan and receive quickly. If your ASN or labels are wrong, you can expect delays and potential non-compliance notices.

4. EDI 810 – Invoice

The EDI 810 Invoice is how you get paid. It must match what CDW expects:

• Correct CDW purchase order number and line numbers
• Accurate quantities and prices
• Tax and freight handled per CDW’s rules
• Any required reference numbers or serial numbers

Clean 810s mean faster payments and fewer disputes. Poorly formatted or mismatched invoices are one of the most common causes of payment delays in CDW EDI flows.

Other CDW EDI Documents You May See Later

As your relationship with CDW grows, you might be asked to support other EDI documents such as:

• EDI 832 – Price/Sales Catalog
• EDI 846 – Inventory Advice
• EDI 997 – Functional Acknowledgment (basic “receipt” for EDI documents)

But as a new vendor, the core focus is usually 850, 855, 856, and 810.

What Does CDW Expect From EDI-Enabled Vendors?

When CDW says you must be “EDI-enabled,” they’re not just talking about the ability to send a file. They care about:

• Accuracy – Orders, ASNs, labels, and invoices must align.
• Timeliness – ASNs and acknowledgements must be sent within agreed windows.
• Compliance – You follow CDW’s mapping rules, communication methods, and test processes.
• Stability – Your CDW EDI integration shouldn’t break every time there’s a minor change.

This is why CDW has formal EDI testing and onboarding workflows. You’ll typically walk through:

1. Connectivity setup (AS2, SFTP, etc.).
2. Test 850, 855, 856, and 810 scenarios.
3. Validation against CDW’s EDI specifications.
4. Promotion from test to production.

Your Options for Handling CDW EDI

Most new vendors consider three main options when CDW requires EDI.

Option 1: Build EDI In-House

This means your team:

• Implements AS2 or SFTP connectivity
• Builds or configures an EDI translator
• Maps CDW 850/855/856/810 documents to and from your ERP
• Maintains all changes, testing, and support

Pros: Full control, no per-transaction reseller fees.

Cons: Requires EDI expertise, internal developers, and ongoing maintenance. Risky for small and mid-sized vendors.

Option 2: Use a Legacy VAN or Large EDI Provider

This is the route many vendors historically took – large EDI providers or Value-Added Networks (VANs) who handle the plumbing but often charge:

• Per-document or per-kilobyte fees
• Additional charges per trading partner
• Setup fees and long-term contracts

Pros: Proven, they’ve likely integrated CDW before.

Cons: Higher recurring costs, slower onboarding, and less flexibility for smaller vendors.

Option 3: Use a Modern Cloud EDI Platform (Like ActionEDI)

Modern EDI platforms are built specifically for small and mid-sized businesses that need enterprise-grade compliance without enterprise overhead.

With a platform like ActionEDI, you get:

• Pre-built CDW EDI mappings for 850, 855, 856, and 810
• Fast onboarding – go live in days, not quarters
• Flat, transparent pricing (no per-partner fees)
• GS1/UCC-128 label generation aligned with CDW requirements
• Integration with your systems (QuickBooks, Sage, ecommerce, and more)
• 24/7 human support when something breaks

Pros: Lower risk, faster implementation, predictable costs, and built-in CDW expertise.

Cons: You still need to align internal processes so your warehouse, finance, and customer service teams are in sync with EDI flows.

Quick Comparison Table

Common CDW EDI Mistakes New Vendors Make

CDW works with thousands of vendors, and the patterns are clear. Here are some of the most common mistakes new suppliers make when rolling out CDW EDI.

1. Waiting Until the Last Minute

Some vendors wait until CDW sets a hard deadline before starting EDI implementation. The result? Rushed testing, stressed teams, and delayed go-live dates.

Better approach: As soon as your CDW vendor agreement is in place, start your EDI planning. Even if you’re not shipping yet, getting the plumbing ready early gives you room to test calmly.

2. Treating EDI as “Just IT’s Problem”

EDI touches operations, warehousing, finance, and customer service. If only IT is involved in your CDW EDI project, you’ll miss key realities of how orders, shipments, and invoices are actually handled.

Better approach: Involve stakeholders from:

• Operations / order management
• Warehouse / logistics
• Finance / AR
• Customer service / account management

Map out the full order-to-cash flow with them, then align your EDI design to real-world processes.

3. Ignoring GS1 Labels and ASN Details

Many vendors focus on getting the 850 and 810 working, but underestimate the importance of ASNs and shipping labels. Inaccurate or late ASNs can cause:

• Receiving delays at CDW warehouses
• Extra manual work on CDW’s side
• Potential non-compliance notices or penalties

Better approach: Treat 856 + labels as mission-critical from day one. Make sure your system can generate compliant GS1/UCC-128 labels, and that your packing and scanning process matches what you send electronically.

4. Manually Keying Data Around EDI

Some vendors “half-implement” EDI: they receive 850s electronically, but then re-key orders into their ERP, or they generate invoices manually from spreadsheets.

This defeats the purpose and opens the door to:

• Price and quantity mismatches
• Missed lines or wrong ship-to locations
• Slow invoicing and cash flow delays

Better approach: Automate the full flow:

• 850 → auto-create sales orders
• Shipments → drive 856 and labels
• Fulfilled orders → drive 810 invoices

5. Choosing a Platform That Doesn’t Scale With Your Growth

It’s tempting to pick the first EDI option that gets you compliant. But if that solution charges per trading partner, per user, or per document, your costs will balloon as you grow.

Better approach: Choose a platform that offers:

• Flat or transparent pricing so you can forecast costs
• Unlimited users and trading partners where possible
• Support for additional retailers beyond CDW, so you can reuse the same system

If you want more examples of how modern EDI supports growth beyond CDW, see our article on EDI for retail, manufacturing, and logistics.

How ActionEDI Helps New Vendors Go Live with CDW Faster

ActionEDI is a modern, cloud-based EDI platform built specifically for small and mid-sized businesses that need to integrate with partners like CDW without burning time or budget.

For CDW vendors, ActionEDI offers:

• Pre-built CDW EDI mappings for 850, 855, 856, and 810
• End-to-end automation from purchase order to invoice
• GS1/UCC-128 label generation aligned with CDW’s receiving processes
• Integration options for QuickBooks, Sage, ecommerce platforms, and custom systems
• Transparent, flat-rate pricing designed for SMEs
• 24/7 human support so you’re not on your own if something fails on a Friday night

Instead of piecing together multiple tools, you get a single platform purpose-built to handle CDW’s requirements while staying flexible enough to support your other retailers, distributors, and marketplaces.

If you’re a new CDW vendor and want to avoid the typical EDI headaches, you can learn more or book a demo at ActionEDI.com.

Frequently Asked Questions About CDW EDI

Do all CDW suppliers need to be EDI-enabled?

In practice, yes. If you’re doing consistent business with CDW, EDI is the standard way to handle orders, shipments, and invoicing at scale. Manual processes simply don’t scale for either side.

How long does it take to go live with CDW EDI?

It depends on your approach. An in-house build or large legacy provider can take several months. With a modern EDI platform that already supports CDW, you can typically move much faster, because the mappings and workflows are already in place.

Which EDI documents do I need to support first?

Most new vendors start their CDW EDI rollout with:

• 850 – Purchase Order
• 856 – Advanced Shipping Notice
• 810 – Invoice

Depending on your category and arrangement with CDW, you may also add 855 Purchase Order Acknowledgements and other documents over time.

Do I need my own AS2 server or special infrastructure?

Not necessarily. Modern EDI providers handle the connectivity (AS2, SFTP, etc.) for you. Your team focuses on business rules and data quality rather than low-level transport.

What if I’m already using another EDI provider?

You can still switch. Many vendors move to a modern platform when their current provider becomes too expensive, too slow to change maps, or too difficult to work with. A structured migration plan can help you move CDW first, then gradually bring other trading partners across.

Can I use the same EDI setup for other retailers?

Yes. While every retailer has its own guidelines, the core technology stack is reusable. A modern platform lets you add new trading partners and document types without starting from scratch every time.

Bottom line: CDW EDI doesn’t have to be overwhelming. With the right partner and a clear plan, you can turn CDW EDI from a compliance headache into a reliable growth enabler for your business.