The Great eCommerce Shift
Why Single-Platform eCommerce Strategies Fail
Your customers stopped thinking about “channels” years ago. They browse Instagram, research on Amazon, compare prices on your Shopify store, and may ultimately buy from Walmart, all for the same product, often within the same hour.
91% of consumers are omnichannel shoppers, and they engage with a brand at an average of 11 touchpoints before buying. They don’t care that you think of “Amazon” and “your website” as separate sales channels. They expect your inventory, pricing, and fulfillment to work seamlessly, no matter where they click “buy.”
The operational challenge isn’t whether to sell on multiple platforms; 80% of Amazon sellers already do. The challenge is managing inventory, orders, and financial data across these platforms without creating operational chaos that destroys profitability as you scale.
If you’re running multi-channel operations through spreadsheets, manual data entry, or disconnected systems, you’re competing at a significant disadvantage against businesses that have unified their operations through their ERP.
How Do Growing Online Retailers Handle Orders from Multiple Channels?
Growing online retailers connect every sales channel to their ERP so orders flow in without manual data entry. With Channel Sales Manager (CSM), orders from Amazon, Walmart, Shopify, BigCommerce, Magento/Adobe Commerce, and WooCommerce automatically create sales orders in Business Central. Fulfillment, inventory updates, and financial posting then run from that single record.
The Data That Proves Single-Platform Strategies No Longer Work
Consumer behavior has fundamentally changed. Omnichannel shoppers deliver a 30% higher lifetime return on investment than single-channel customers, and businesses that engage shoppers across channels retain 89% of their customers, compared to 33% for retailers that engage through only one channel.
This isn’t about small percentages. Retailers using three or more channels increase consumer engagement 250% compared to single-channel operations, and omnichannel customer engagement increases average sales revenue by 9.5%.
The shift extends beyond consumer retail into B2B. McKinsey found that B2B customers use an average of 10 interaction channels in their buying journey, up from five in 2016. 75% of B2B buyers are ready to switch suppliers for a more seamless, user-friendly online buying experience.
Operationally, this means you can’t treat Amazon, Walmart, your Shopify store, and wholesale orders as separate businesses anymore. Customers expect unified inventory visibility, consistent pricing, and reliable fulfillment regardless of where they transact with you.
Why The Platform Landscape Keeps Expanding
Amazon accounted for nearly 40% of US eCommerce in 2025, but the competitive landscape has shifted dramatically. Walmart Marketplace added 44,000 new sellers in the first five months of 2025 alone, compared to 59,000 in all of 2024, bringing total active sellers to over 200,000.
Walmart now hosts 420 million products, with 95% coming from third-party marketplace sellers rather than Walmart’s own inventory. This explosive growth creates opportunity, but also demonstrates why relying solely on Amazon exposes you to competitive risk.
Your customers are already shopping across these platforms. The question is whether your operations can support their expectations.
What Is Multi-Channel Order Management?
Multi-channel order management is the process of capturing, fulfilling, and reconciling orders from every sales channel in one system instead of managing each platform separately. For a closer look at how this works, see Multi-Channel eCommerce Order Management in Business Central.
The Operational Nightmare Of Disconnected Channel Management
Managing multiple sales channels sounds simple until you encounter the operational realities:
Inventory synchronization: You sell a unit on Amazon at 2 PM. When does your Shopify available quantity update? If the answer is “when I manually adjust it” or “overnight when the batch sync runs,” you’re either overselling (creating customer service nightmares) or underselling (leaving money on the table with inflated safety stock).
Order routing complexity: A customer orders a product available in your warehouse and your FBA inventory. Which fulfillment location should process it? The decision depends on customer location, shipping costs, inventory velocity requirements, and marketplace fee structures. Making this calculation manually for every order doesn’t scale.
Financial reconciliation: Walmart has its own commission structure. Shopify processes payments differently than marketplace settlements. How do you calculate true product profitability when your revenue data lives in five different systems with incompatible data formats?
Pricing management: You run a promotion on Walmart. Should Amazon pricing change? What about your Shopify store? If you manage prices independently on each platform, you’ll either leave margins on the table or create pricing inconsistencies that confuse customers and damage brand perception.
Returns and refunds: A customer buys on Amazon but wants to return to your warehouse. Do you process this in Amazon’s system, your ERP, or both? How does your inventory count update? How do your financial records reflect the credit memo? Manual processes create discrepancies that compound over time.
These aren’t theoretical problems; they’re the daily operational reality for businesses managing $500,000+ in multi-channel revenue without unified systems.
Why Spreadsheets and Manual Processes Fail At Scale
You can manage 50 SKUs across two platforms manually if you have unlimited time and a high tolerance for errors. At 200 SKUs across four platforms, manual management becomes a full-time job that still produces mistakes.
Here’s the math: If you update inventory once daily across four platforms for 200 SKUs, that’s 800 manual entries per day, 5,600 per week, 291,200 per year. Even at 99% accuracy (optimistic for manual data entry), you’re introducing 2,912 inventory errors annually.
Every error has downstream consequences. Overselling requires customer service intervention, refund processing, and can lead to negative reviews. Underselling means you pay Amazon storage fees for inventory that should be selling while also maintaining higher safety stock across all channels.
The problem compounds when you factor in pricing updates, promotional schedules, and order processing. You’re not managing data entry; you’re managing a complex system that requires automation to function reliably.
What Unified Inventory Management Actually Solves
True multi-channel success requires a single source of truth for inventory, orders, and financial data. Here’s what changes when your ERP becomes that unified system:
Real-time inventory synchronization: When you sell a unit on any channel, all other channels immediately reflect the updated availability. You won’t guess about inventory levels or maintain excessive safety stock to prevent overselling. You can run leaner inventory while supporting more sales channels.
Intelligent order routing: Orders automatically route to the optimal fulfillment location based on rules you define. Customer location, product characteristics, inventory availability, and fulfillment costs all factor into automated decisions. You don’t manually review each order; you manage business logic that scales.
Unified financial visibility: Your ERP consolidates revenue, fees, and costs from all channels, so you can analyze profitability at the product, customer, or channel level. You can see which products drive margin and which destroy it across all sales channels at once.
Automated reconciliation: Marketplace settlements, platform fees, and payment processing charges post automatically to the correct general ledger accounts. Your finance team analyzes performance instead of manually categorizing thousands of transactions each month.
Centralized pricing management: Update pricing once in your ERP and changes propagate to all connected channels based on your rules. Run channel-specific promotions without creating pricing inconsistencies. Maintain brand integrity while maximizing revenue across platforms.
Multi-Channel Fulfillment: Using One Inventory Pool For All Sales
Amazon’s Multi-Channel Fulfillment (MCF) represents a significant operational shift for businesses managing multiple sales channels. MCF lets you fulfill orders from Shopify, Walmart, and other platforms using inventory stored in Amazon’s fulfillment network.
78% of Amazon sellers prefer FBA, but traditionally, that inventory could only fulfill Amazon orders. MCF removes this limitation; you maintain one FBA inventory pool and fulfill orders from any connected channel.
The economics make sense: MCF fees start at $3.64 per unit for orders of 4+ units (small standard items, 4 oz or less, non-peak 2026 rates). You get FBA’s logistics infrastructure without requiring customers to buy on Amazon.
But here’s the operational complexity: you need your ERP to route orders intelligently. When an order comes in from Walmart, Shopify, or another connected platform, should it fulfill from FBA via MCF, from your warehouse, or from a third-party logistics provider? The answer depends on product dimensions, destination, inventory levels across locations, and your fulfillment cost thresholds.
Manual decision-making doesn’t scale. Automated order routing based on business rules does.
The Platforms You Need To Support
The data reveals which platforms matter for mid-market sellers:
Amazon remains essential with nearly 40% of US eCommerce in 2025. However, only 165,000 new sellers launched their first Amazon listing in 2025, and active sellers dropped from 2.4 million in 2021 to 1.65 million by the end of 2025. Intense competition makes operational efficiency critical.
Walmart Marketplace represents the fastest-growing opportunity. Adding 44,000 sellers in the first five months of 2025 shows explosive expansion: 420 million products are now available, 95% from third-party sellers. Walmart’s growing seller base makes it attractive for sellers looking to diversify.
Shopify provides branded storefront capabilities. The platform gives sellers control over the customer experience and data that marketplaces don’t provide, making it essential for brand building.
BigCommerce serves B2B sellers with wholesale pricing capabilities, custom catalogs, and payment terms that Shopify’s native features don’t fully support.
Magento/Adobe Commerce handles complex product catalogs and sophisticated pricing rules for enterprises managing thousands of SKUs with intricate relationships.
WooCommerce integrates with WordPress, making it ideal for businesses with existing content management systems that want to add eCommerce without migrating platforms.
Your platform mix depends on your products, customers, and business model, but the operational requirement stays the same: you need unified inventory management no matter which channels you support.
What Business Central Integration Enables Across Channels
Channel Sales Manager (CSM) connects Business Central with Amazon, Shopify, BigCommerce, Magento/Adobe Commerce, WooCommerce, and Walmart (released April 2025). Here’s what that integration actually does:
Unified inventory across all channels: Maintain one inventory record in Business Central. When you sell on any platform, all channels reflect updated availability. When you receive a purchase order, every connected channel sees the new stock at the same time. You don’t reconcile inventory counts across systems; you have one source of truth.
Automated order flow: Orders from any marketplace automatically create sales orders in Business Central, triggering your existing fulfillment workflows. You process Amazon, Walmart, and Shopify orders through the same system using the same staff and procedures.
Multi-channel fulfillment orchestration: Orders route to FBA, MCF, your warehouse, or third-party logistics based on business rules you define. Automated decisions factor in customer location, product characteristics, inventory availability, fulfillment costs, and delivery speed requirements.
Channel-specific financial tracking: Revenue posts to appropriate general ledger accounts by channel and product. You can analyze profitability by marketplace, compare channel performance, and identify which platforms drive margin versus which drain resources through excessive fees.
Bi-directional refunds and returns: When customers initiate returns on marketplaces, CSM creates corresponding credit memos in Business Central and updates inventory. Your financial records stay automatically synchronized with marketplace activity.
Centralized product information: Manage product descriptions, images, pricing, and attributes in Business Central. Updates propagate to all connected channels based on your configuration. You don’t have to manually update product information in six different systems.
Marketplace settlement reconciliation: Amazon settlement data posts to Business Central with transaction-level detail. The same applies to Walmart, Shopify, and other platforms. Your finance team reconciles payments against sales orders instead of manually categorizing thousands of marketplace fees.
This isn’t about having “better dashboards”; it’s about operating at a complexity level that manual processes fundamentally cannot support at scale.
The Competitive Advantage Of Operational Excellence
Platform access is commoditized. Anyone can create seller accounts on Amazon, Walmart, and Shopify. What isn’t commoditized is the operational infrastructure to manage inventory, orders, and finances across these platforms efficiently.
Omnichannel customers shop 1.7 times more than single-channel shoppers and spend more per transaction. You capture that revenue only if your operations can support their purchasing patterns without creating inventory errors, fulfillment delays, or financial reconciliation problems.
The businesses winning in multi-channel eCommerce aren’t those with the best products or lowest prices; they’re those with operational systems that let them profitably serve customers across every channel they want to use.
Your competitors who have unified their operations through ERP integration can:
- Run leaner inventory while supporting more channels
- Route orders optimally without manual decision-making
- Calculate true product profitability, including all channel-specific fees
- Scale to new platforms without proportionally scaling operational staff
- Maintain pricing consistency and promotional coordination across channels
You can’t compete against these operational advantages using spreadsheets and manual processes. The complexity gap widens as you grow, eventually creating a ceiling you can’t break through without transforming your systems.
Where To Start With Multi-channel Unification
If you’re using Business Central and managing multiple sales channels, or considering expansion beyond your current platforms, start by assessing your integration approach:
Manual exports and imports create lag, introduce errors, and don’t scale beyond low-order volumes. If you’re downloading CSV files from marketplaces and importing them into Business Central, you’re spending labor on data entry that should be focused on growth.
Point-to-point API integrations require ongoing maintenance as platforms change specifications. Custom code breaks when Amazon updates its API, creating urgent firefighting projects instead of planned development work.
Purpose-built middleware like Channel Sales Manager is designed specifically for Business Central + marketplace combinations. Pre-built logic handles common scenarios (inventory sync, order processing, returns, financial posting) with ongoing updates as platforms evolve.
The question isn’t whether integration provides value; it’s whether you’re capturing that value now or leaving it to competitors while you manage spreadsheets.
What This Means for eCommerce Businesses
Single-platform strategies worked when eCommerce was emerging, and customers accepted limited options. Those conditions no longer exist. 91% of consumers are omnichannel shoppers.
Successful businesses will recognize that multi-channel complexity requires multi-channel solutions. You can’t manage unified commerce with disconnected systems; your ERP must serve as the single source of truth for inventory, orders, and financial data across all platforms.
This isn’t a technology problem; it’s a business strategy decision. Companies that treat eCommerce channels as separate businesses will lose to competitors who leverage unified operations for competitive advantage. Your customers have already chosen how they want to shop. The question is whether your operations can support their expectations.
Amazon, Walmart, Shopify, and other platforms provide access to customers. Channel Sales Manager provides the operational foundation to serve those customers profitably across every platform they use, with unified inventory managed in Business Central.
Your product catalog gets you onto marketplaces. Your systems determine whether you scale profitably or drown in operational complexity as you grow.
Frequently Asked Questions
How are orders captured from Amazon, Walmart, and Shopify?
CSM connects each channel to Business Central. When a customer places an order on Amazon, Walmart, or Shopify, CSM automatically creates a matching sales order in Business Central. Your team processes every order through the same system, using the same staff and procedures.
How does Business Central reduce manual order entry?
With CSM, Business Central becomes the single record for orders, inventory, and financial data. Orders arrive as sales orders automatically, available inventory updates across every connected channel, and marketplace settlements post to the general ledger with transaction-level detail. Your team stops downloading CSV files and retyping orders.
Related Resources:
- eCommerce Strategic Planning – Amazon
- What an eCommerce Business Really Gains from ERP Integration
- The Secret Life of eCommerce Orders and Inventory
- Why Your Inventory Counts Never Match
- Multi-Channel eCommerce Order Management in Business Central
- Channel Sales Manager for Business Central
- Multi-Channel Fulfillment with Amazon MCF
- Financial Management for Amazon Sellers
- The Power of CSM Notifications: Enhancing BC
- CSM Item Variations
Ready to unify your multi-channel operations? Request a CSM demonstration to explore how Business Central can become your single source of truth across Amazon, Walmart, Shopify, and other platforms you use to reach customers.
