Ask anyone who manages purchasing at a distribution company where their day goes, and the answer is rarely strategy. It goes to follow-up. A buyer emails a supplier to confirm a purchase order, waits, calls when no reply arrives, then re-keys the confirmation into the ERP once it finally lands. Multiply that across hundreds of open orders and dozens of active vendors, and a real share of the team’s week disappears into chasing information that already exists somewhere.
The frustrating part is that this pattern holds even when the underlying systems are modern. A distributor running Microsoft Dynamics 365 Business Central, or any comparable ERP, has clean order data, accurate inventory positions, and reliable financials. Yet the conversation with vendors still happens in inboxes and on phone calls the system never records. The gap is not the ERP. It is the absence of a shared, structured place where vendors and the business can exchange information without a person sitting in the middle of every exchange.
That gap is exactly what Power Pages was built to close, and understanding how it works is worth the time for any distribution leader weighing where to spend the next round of automation effort.
What Power Pages Actually Is
Power Pages is the external-facing website layer of the Microsoft Power Platform. Where Power Apps builds internal applications and Power Automate runs background workflows, Power Pages lets you stand up secure, low-code websites that people outside your organization can sign into. Vendors, customers, and partners get their own controlled view into your business data without ever touching your internal systems directly.
The piece that makes it operationally useful is the connection underneath. Power Pages runs on Microsoft Dataverse, and it cannot run without it. When you build a vendor portal, the data a supplier sees on screen is the same data that lives in your environment, surfaced through a defined set of permissions. According to Microsoft’s own guidance, you assign external users to security roles called web roles, and those roles control exactly which records each vendor can read or update. A supplier logging in sees their own purchase orders and nothing belonging to anyone else.
For a distributor, this matters because vendor communication is not a marketing problem. It is a data problem. The information a vendor needs already sits in your ERP. The work is in exposing the right slice of it, to the right person, in a form they can act on.
Where the Manual Effort Actually Lives
It helps to be specific about which conversations consume the most time, because those are the ones worth automating first.
Purchase order acknowledgment is usually the largest. A buyer issues an order, then spends days confirming the vendor received it, accepted the terms, and committed to a ship date. A Power Pages portal turns this into a self-service action. The vendor logs in, sees the open order, and confirms, proposes a change, or flags a problem. The response writes back through Dataverse and updates the order status in your system without anyone re-typing anything.
Vendor onboarding is the second. Bringing on a new supplier means collecting tax forms, insurance certificates, banking details, and compliance documents, then following up on whatever is missing. A portal lets vendors register, upload what is required, and complete the process at their own pace, while Power Automate handles validation and routes records for internal approval. The administrative chase that used to eat days of a coordinator’s time shrinks to an exception list.
Then there is the ongoing rhythm of status updates, delivery changes, and invoice submission. Each of these is a small transaction that, handled by email, generates a long thread and at least one manual data entry. Handled through a portal, the vendor enters the information once, and the system captures it directly. Power Automate can sit on top of these events to validate inputs, send notifications, or escalate when something stalls, so the right people learn about a delayed shipment the moment a vendor flags it rather than the morning the truck fails to arrive.
The shift here is not flashy, and that is the point. You are removing the human relay between two systems that should have been talking to each other all along.
The Operational Payoff, and Why It Is Showing Up Now
Digital supplier portals have moved from novelty to baseline expectation. By the end of 2024, roughly 35 percent of procurement systems had integrated supplier portals for order tracking, payment visibility, and dispute resolution, and the same research found procurement teams cutting manual workloads by about 40 percent through automation. That momentum is backed by spending. A separate 2026 supply chain survey found that 67 percent of firms increased their investment in visibility tools over the prior year, while weak data integration with external partners remained one of the leading barriers to getting value from them. Vendors increasingly expect to self-serve, and the businesses that give them a clean way to do it spend less time mediating and more time on decisions that need a human.
Microsoft has read the same signal. Its newer Supplier Engagement application for Dynamics 365 includes a supplier-facing portal built on Power Pages that handles requests for quotation, purchase orders, and invoices. This capability is rolling out through Microsoft’s 2026 release waves, so exact naming and availability may continue to shift. The direction, though, is hard to miss: vendor collaboration through Power Pages is becoming a supported, mainstream pattern rather than a custom one-off.
For distributors already standardized on Business Central, this is less a new initiative than a natural extension of systems already in place. The portal does not replace the ERP. It gives the ERP a front door that vendors can use.
A Word on Security and Governance
The convenience of a vendor portal comes with a responsibility that deserves attention before you build one. Web roles control what a vendor sees in the portal interface, but governance has to be designed carefully. Microsoft’s documentation is direct about one risk worth understanding: restricting a vendor’s view in the web role does not, by itself, stop a determined user from targeting the underlying data entity and reading more than intended. Proper setup of table permissions and Dataverse security is what keeps one supplier from ever seeing another’s pricing or orders.
This is not a reason to avoid Power Pages. It is a reason to treat the configuration as a real project rather than a weekend build, and to lean on a partner who has set up the security model before. The cost of getting it right is small. The cost of exposing competitor data to a vendor is not.
How to Think About the First Step
The most useful way to approach this is to start narrow. Pick the single vendor interaction that generates the most back-and-forth, often purchase order acknowledgment, and build the portal around that one workflow. Prove that the write-back to Business Central is clean, that the security model holds, and that vendors actually adopt it. Once that loop works, onboarding, invoicing, and status updates extend from the same foundation rather than starting from scratch.
Power Pages rewards this kind of incremental approach because it shares the same data layer across every workflow you add. The first portal is the hard part. Everything after compounds on top of it.
Vendor communication will never be the work that defines a distribution business, but the time lost to it quietly shapes how much capacity the team has for everything else. For leaders evaluating where automation earns its keep, a structured look at where vendor communication breaks down today, before any portal gets designed, is usually the most productive place to begin. If your team already runs Business Central, that assessment is a sensible next conversation to have, and it is a natural moment to map how far the Power Platform can extend the system you already own. This is the kind of work ACE Micro does every day, pairing Business Central and Power Platform implementations with the fixed-cost pricing and unlimited support that keep a vendor portal running well after launch. If you are weighing where to start, reach out to the ACE Micro team to talk through your vendor workflows and what a first portal could look like.