Can Power Pages reduce ERP customization and licensing costs at the same time?
Yes, in one specific pattern: move external and occasional users out of the ERP entirely. A Power Pages portal running against Dataverse replaces both the ERP licenses those users would consume and the custom ERP modules you would otherwise build for them. Core transaction processing stays in the ERP, and any claim of savings there should be treated separately.
Why the two costs rise together in the first place
ERP customization spend and ERP licensing spend look like separate line items, but in most estates they have a single root cause: the ERP is the only door into the data, so every population that needs to touch a record gets pushed inside the system. Vendors confirming purchase orders, field crews logging service activity, applicants checking a status, auditors pulling evidence, occasional approvers who sign off twice a quarter. Each group needs a license to get in, and each group needs screens the ERP does not ship with, so the customization backlog and the license count grow in lockstep.
That is why the question is asked the way buyers ask it. You are not choosing between a customization initiative and a licensing initiative. You are asking whether one architectural move can take pressure off both. It can, if the move is to stop treating external and occasional users as ERP users at all.
Where the customization savings actually come from
Customizing the ERP core is the most expensive way to build a screen that exists. Core modifications are written against the vendor’s extension model, tested against the vendor’s release cadence, and re-validated at every upgrade. In a regulated environment each modification also carries its own validation and audit burden. The practical consequence is familiar to anyone running a mature ERP: a backlog of portal-shaped requests, self-service lookups, status views, simple submissions, that wait behind finance-critical work because everything competes for the same ERP development capacity.
A Power Pages portal moves that class of work out of the ERP core and into a portal layer. The screens are built in Power Pages against Dataverse tables, integration to the ERP happens through controlled interfaces, and the ERP itself stays closer to standard. The savings are not hypothetical efficiency gains; they are the difference between an ERP core modification with upgrade and validation drag, and a portal page that can change without touching the system of record. The requests that clog an ERP backlog are usually exactly the requests a portal absorbs.
Two boundaries keep that honest. First, the portal layer does not eliminate integration work: data still has to move between Dataverse and the ERP under proper controls, and that interface is real engineering. Second, if a process genuinely belongs in the ERP core, posting logic, costing, MRP behavior, a portal does not remove the need to build it there. The savings come from the work that never belonged in the core to begin with.
The licensing arithmetic, framed correctly
ERP vendors license people who log in. The license models differ by vendor and tier, and the specific numbers belong in your own agreement, so we will keep them qualitative here: a full ERP user license for someone who touches the system a few times a month is one of the most expensive per-use seats in enterprise software.
Power Pages prices the other way around: it licenses website capacity, not named ERP seats. On Microsoft’s published pricing, an authenticated-user capacity pack lists at $200.00 per website per month for 100 users per site per month, paid yearly, and an anonymous-user pack lists at $75.00 per website per month for 500 users per site per month, paid yearly. The arithmetic that matters is the shape, not just the totals: portal capacity is bought in pools sized to actual monthly activity, so occasional users cost a fraction of a dedicated seat, and users who only read public content can ride anonymous capacity.
Run the comparison on your own numbers, per population: take each group of external or occasional users currently holding ERP licenses (or on the request list for them), count who actually needs to transact in the ERP versus who needs to see, submit, or confirm data that can live in Dataverse, and price the second group as portal capacity instead of ERP seats. In our experience the second group is usually larger than the ERP license register admits, because license sprawl accumulates one reasonable-sounding exception at a time.
Where Power Pages does not save you money
Treat any pitch that positions a portal as ERP cost elimination with suspicion. The following stays in the ERP, and its costs stay with it:
- Core transaction processing. Order-to-cash, procure-to-pay, production orders, MRP runs, financial posting. The portal can capture a request or display a status; the transaction itself belongs to the ERP.
- Heavy internal users. Anyone living in the ERP all day keeps a full license. Power Pages does not change that math and was never meant to.
- Compliance-bound records. If the record of authority must reside in the ERP for regulatory or audit reasons, the portal presents it; it does not replace it.
- Integration and capacity costs. The portal introduces its own line items: build effort, Dataverse database and file capacity, and the interfaces that keep portal data and ERP data consistent. An honest business case counts them.
There is also a licensing boundary to respect in the other direction: if a portal user’s activity reaches back into the ERP to execute transactions under their identity, vendor license terms on indirect access can apply. This is exactly the area where an experienced licensing reviewer earns their fee, and why we recommend the portal design and the license position be worked as one exercise, not two.
Scenario fit: where the pattern lands
| Scenario | Power Pages fit | Why |
|---|---|---|
| Vendor and supplier self-service (PO confirmation, invoice status, document submission) | Strong | External population, occasional use, portal-shaped screens, no ERP core logic required |
| Applicant, member, or citizen-facing intake and status | Strong | High-volume external users who should never hold ERP licenses; anonymous capacity may cover read-only traffic |
| Field and plant-floor activity capture feeding the ERP | Good | Occasional structured input; data lands in Dataverse and posts to the ERP through a controlled interface |
| Auditor and regulator evidence access | Good | Time-boxed external access with tight scoping beats provisioning ERP accounts |
| Occasional internal approvers | Case by case | Depends on where the approval must legally execute and on your ERP vendor’s indirect-access terms |
| Replacing core ERP modules (finance, MRP, costing) | Poor | Transaction logic belongs in the ERP; a portal here adds a layer without removing cost |
The regulated-tenant part: governance is the difference between savings and exposure
An external portal in a regulated enterprise is an external attack surface wired to your system of record, and it should be designed as one. That means external identity done deliberately (Microsoft Entra External ID or equivalent, not shared accounts), Dataverse security roles and table permissions scoped so a portal user can reach exactly the rows the design intends, web roles mapped to real populations, and the data flowing between Dataverse and the ERP classified before it moves. None of this is exotic; all of it has to be decided before go-live, because retrofitting row-level security onto a live external portal is remediation, not governance.
This is the standard we hold in our own delivery. i3solutions runs a governed Power Platform for a federal defense agency supporting roughly 10,000 personnel across about 180 locations, which works because it is governed, not despite it. The same discipline, environment strategy, security-role design, controlled interfaces, audit-ready configuration, is what makes an ERP-adjacent portal defensible to the people who will eventually review it.
What the honest business case looks like
Build the case in three columns, and let each stand on its own evidence:
- License avoidance. ERP seats not purchased or reclaimed for the populations that move to the portal, priced from your actual agreement, against portal capacity priced from Microsoft’s published list.
- Customization avoidance. The portal-shaped items in your ERP backlog, estimated at ERP-core cost versus portal-layer cost, plus the upgrade and validation drag each core modification would have carried through every future release.
- New costs, counted honestly. Portal design and build, Dataverse capacity, ERP integration, external identity, and the governance work described above.
When the first two columns clear the third with room to spare, the pattern pays for itself, and it typically does when the external population is real and the backlog is portal-shaped. When they do not, you have learned that cheaply, which is the point of doing the arithmetic before the build.
When to bring in a partner
Bring in a partner when the decision has to survive a license negotiation and an audit, not just a demo. i3solutions has completed more than 600 Microsoft platform implementations. i3Solutions has delivered this pattern on Microsoft Dynamics 365 CRM integrations in a regulated healthcare environment and on enterprise application integration for a global professional services firm serving 125,000 users. The engagement shape for this decision is deliberately bounded: scope the candidate populations, price both columns against your real agreements, and design the portal and governance architecture as one artifact. Fixed-fee project consulting for modernization initiatives ranges $55K-$450K depending on scope. i3solutions routes a senior U.S.-based engineer to a client call usually within one to two weeks.
If the portal-versus-ERP-seat arithmetic is the open question in your environment, start with the Power Pages development services team, review the broader Power Platform development services practice, or have the license position reviewed by Power Apps licensing consultants before you commit either budget line.
Frequently asked questions
Can Power Pages replace our ERP?
No, and it should not try. Power Pages replaces the portal-shaped work around the ERP: external self-service, intake, status, and evidence access. Core transaction processing, MRP, and financial posting stay in the ERP. The savings come from moving external and occasional users out of ERP licenses and ERP customization queues, not from replacing the system of record.
How is Power Pages licensed?
By website capacity rather than named seats. On Microsoft’s published pricing, authenticated-user capacity lists at $200.00 per website per month for 100 users per site per month, and anonymous-user capacity at $75.00 per website per month for 500 users per site per month, both paid yearly. Capacity packs stack, so a site is sized to actual monthly activity.
Does moving users to a portal violate ERP license terms?
It can if done carelessly. Most ERP vendors have indirect-access provisions covering users who execute ERP transactions through another front end. The clean pattern keeps portal activity in Dataverse and posts to the ERP through controlled, licensed interfaces. Review your specific agreement before assuming savings; this is a design decision and a licensing decision at once.
What new costs does a Power Pages portal introduce?
Four honest line items: portal design and build, Dataverse database and file capacity, integration between Dataverse and the ERP, and governance work including external identity and security-role design. A credible business case counts all four against the license and customization avoidance, and still clears the bar in most real external-user scenarios.
Is Power Pages safe to expose externally in a regulated environment?
Yes, when it is governed as an external attack surface from day one: deliberate external identity, Dataverse security roles and table permissions scoped to the design, web roles mapped to real populations, and classified data flows to the ERP. i3solutions runs a governed Power Platform for a federal defense agency supporting roughly 10,000 personnel across about 180 locations, which works because it is governed, not despite it.
How do we scope this decision without a long consulting engagement?
Bound it: list candidate external and occasional user populations, split them into must-transact-in-ERP versus can-work-in-portal, price both columns from your real agreements and Microsoft’s published portal pricing, and design governance alongside. Fixed-fee project consulting for modernization initiatives ranges $55K-$450K depending on scope, and i3solutions routes a senior U.S.-based engineer to a client call usually within one to two weeks.
