How Companies Can Improve SAP Cost Management Without Replacing SAP

Key takeaways:

• Enterprises struggle to justify hefty SAP licensing costs against the value the system delivers as they scale.
• SAP optimization keeps core ERP functionality intact while redistributing approvals, reporting, and vendor workflows to a leaner Microsoft layer.
• Microsoft 365 gives enterprises a proven extension layer for SAP environments, though premium capabilities like Power Automate, Power BI PPU, and Power Apps often need licensing beyond standard plans, with net savings depending on existing entitlements.
• Enterprises that take this approach bring SAP spend in line with actual usage, improve system performance, and carry clean core integrity into S/4HANA migration.

SAP has earned its place as the system of record for the world’s largest organizations. Finance, procurement, supply chain, manufacturing, HR, and compliance all run through it, simultaneously, across geographies and business units. Over time, it becomes inseparable from how the organization operates.

The problem surfaces when the cost structure grows faster than the value does. License consumption climbs as more people get added as named users. External systems generate indirect usage. Reporting workloads accumulate inside the ERP. Customization requirements grow with every business change and compound across upgrade cycles. What started as a well-scoped implementation becomes a cost base that feels difficult to control.

Good SAP cost management means drawing a precise architectural boundary that defines what SAP owns, what Microsoft owns, and how those two environments communicate. The goal is to ensure SAP licensing reflects actual transactional load rather than the accumulated weight of workloads that never belonged in the ERP.  This is a defined system boundary design suited to enterprise environments where operational continuity is non-negotiable.

Why SAP Costs Keep Increasing in Large Enterprises

SAP costs rarely come from a single source. They accumulate in distinct layers, and each layer adds to the total independently.

Figure 1: The Hidden Cost Layers Driving SAP Spend in Large Enterprises

1. The Named User Base Expands Beyond the Transactional Core

As organizations grow, they add more employees as named SAP users, even when those employees interact with the system only occasionally. A procurement approver who logs in twice a week carries the same license cost as a procurement analyst processing transactions all day. A finance director reviewing a quarterly report pays the same as the controller running month-end close. The named-user model does not account for frequency or depth of use. That gap between license spend and actual transactional value keeps widening as the organization scales.

2. Approval Chains Multiply Across the Organization

In procurement, finance, and operations, approval chains can involve dozens of users. Each one holds a named SAP license for interactions that take only a few minutes per session. As the organization grows, these chains extend further and the license footprint grows with them, gradually, without a single trigger point that makes the accumulation visible.

3. Reporting Workloads Build Up Inside the ERP

Teams add BW environments, Crystal Reports, and custom ABAP-based reports over time as business needs evolve. Each addition increases compute load, maintenance overhead, and license costs. Organizations could serve most of this reporting from an external analytics platform connected to SAP. Instead, it stays inside the ERP and consumes resources that the system was never meant to carry.

4. External Systems Generate Indirect Access That Is Difficult to Track

When a supplier portal, logistics platform, or procurement tool creates a document or triggers a transaction inside SAP, it generates license consumption beyond the named user count. Organizations consistently underestimate this indirect access in license reviews. It is one of the least visible contributors to rising SAP costs.

5. Customization Overhead Compounds With Every Upgrade Cycle

Every workflow modification made to meet a business requirement becomes a maintenance obligation that carries through every subsequent upgrade. Infrastructure scales with data volume and transaction growth. Regulatory and localization complexity for global operations keeps accumulating as the system matures. 

Together, these factors push the cost structure well beyond what the core transactional ERP requires. Identifying which workloads drive this overhead is the starting point for effective SAP cost management.

What Should Stay Inside SAP

Before deciding what to move, organizations need to understand what SAP must retain and why those functions cannot safely move elsewhere.

Figure 2: Core Governance Controls That Must Remain Within SAP

1. Transactional Processing With Built-In Controls

SAP manages every enterprise transaction through module-specific workflows where process discipline sits at each step. 

In procurement, the cycle runs from purchase requisition through purchase order, goods receipt, invoice verification, and payment. For finance, it flows through general ledger postings, cost centre allocations, and period-end close. Consider manufacturing, production orders connect to material requirements, capacity planning, and inventory.

A practical example illustrates the depth of this control. When an employee requests a laptop, SAP does not simply log the request. The system checks authorization to raise the requisition, validates approval thresholds, confirms cost centre assignment, and verifies project budget availability. If no approved project master exists, no budget gets committed and no spend proceeds. Every module operates on this same principle. No transaction advances without a validated structure already in place.

2. Master Data as a Control Mechanism

Every SAP transaction depends on validated master data. 

• To raise a purchase order, the vendor must exist in the vendor master with its approval process completed. 
• To procure a material, a material master record with all mandatory fields must exist. 
• To allocate cost, a project master with an approved budget must be in place.

In regulated industries such as pharmaceuticals, this precision carries significant weight. For example, Paracetamol and Panadol are the same molecule, but the material master ensures the system procures the correct item from the approved vendor at the validated price. Mandatory fields block the transaction if anything is incomplete. System architecture enforces this control rather than relying on manual oversight.

3. Cross-Module Dependencies and Financial Integrity

SAP’s reliability comes from how tightly its modules connect. 

• A purchase order in materials management links automatically to cost centre accounting and goods movement in warehouse management. 
• A sales order connects simultaneously to inventory, production planning, and financial accounting. 
• A project cost posting flows into controlling and the relevant work breakdown structure. 

Every transaction propagates through the system with full traceability across functions. This interconnection is what makes SAP the system of record for organizations with complex compliance requirements and multi-geography operations.

4. Approval Structures Tied to Named Users

SAP configures approval logic within its transactional flow. The system governs release strategies for purchase orders, approval workflows for financial postings, and authorization structures for inventory movements.

Every participant in an approval chain holds a named SAP user account, regardless of how limited their interaction is. This is one of the clearest drivers of license consumption beyond the transactional core and one of the most addressable. 

Figure 3: SAP Transaction Validation Workflow Before Commit

What Workloads Can Move Outside SAP

Workloads that are safe to redistribute share a defining characteristic: they interact with SAP data but do not need direct ERP access to fulfil their function. Moving these workloads to a governed Microsoft layer reduces SAP licensing pressure without touching core ERP operations.

Figure 4: Enterprise Workloads That Can Operate Outside SAP Through a Microsoft Layer

1. Approvals and Notifications

A procurement approver reviewing a purchase request, a manager authorizing a supplier payment, or a finance lead signing off on a cost posting does not need full SAP access to complete that action. Organizations can route the approval through Microsoft Teams or Power Automate, write the decision back to SAP through a certified connector, and retire the named license for that approver. The audit trail remains intact inside SAP throughout.

2. Reporting and Analytics Consumption

Executives, department heads, and business analysts need access to operational data, not the transactional system itself. Organizations can extract SAP data to Azure Data Lake, structure it into analytics-ready layers, and serve it through Power BI dashboards. Users get fast, self-service access to the information they need without consuming SAP compute or licensing resources.

3. Vendor and Supplier Interactions

Suppliers submitting invoices, updating delivery schedules, or responding to purchase orders can use a lightweight portal built on Power Pages. Data flows into SAP through governed integration, and the supplier never needs a named ERP seat.

4. Document Management and Supporting Workflows

Approval attachments, vendor documents, internal discussions, and process records do not belong inside the ERP. Organizations can store these in SharePoint with metadata and an SAP object number as a reference. This keeps traceability intact and removes non-transactional load from the core system.

5. Occasional and Field User Interactions

Field workers logging goods receipts, employees submitting expense requests, or plant managers checking production status need a specific function, not full ERP access. A targeted interface connected to SAP through OData or BAPI serves this need precisely, without a named license.

In every case, the governing principle is the same: the Microsoft layer orchestrates and presents, but SAP validates and commits. No workload redistribution bypasses SAP’s transactional authority.

The SAP + Microsoft Hybrid Optimization Approach

The architectural approach that makes this cost reduction executable is an integration pattern that both SAP and Microsoft natively support. It relies on certified connectors, standard authentication mechanisms, and established partner guidance. SAP stays the authoritative system of record. Selected operational processes move into a structured Microsoft layer that communicates with SAP through certified, auditable connections. Every write-back from the Microsoft layer lands in SAP with a full audit trail, and SAP holds the source of truth throughout.

This design spans eight defined layers, each carrying a specific responsibility.

Figure 5: Eight-Layer SAP–Microsoft Hybrid Architecture for Cost Optimization

Layer 1: User Experience Layer

This is the layer where different types of users interact with enterprise systems, and the right interface depends on role rather than convenience.

Core SAP users such as finance, procurement, supply chain, manufacturing, and inventory teams continue using SAP GUI or SAP Fiori. Their work is highly transactional and system intensive, so they need the full interface.

Occasional users can make use of Microsoft-enabled tools instead:

• Approval-only users interact through Teams adaptive cards or Power Automate approval flows.
• Report consumers interact through Power BI.
• Vendors and suppliers interact through Power Pages or a similar portal-style interface.
• Field users interact through a lightweight mobile interface built for their specific task.
• Admins use a simplified administrative interface alongside standard SAP admin tools.

This ensures users interact only with the specific process step relevant to them. They never need to navigate the full SAP system for a single task.

It is worth being clear on one point: A simplified Microsoft interface is not a replacement for SAP GUI across the board. It exists for controlled, lightweight interactions, not for the full depth of transactional work that core SAP users perform. The practical result is reduced dependence on direct SAP access for users who need only limited interaction with SAP-driven processes.

Layer 2: Process and Workflow Layer

This layer manages approvals, routing, notifications, escalations, reminders, and lightweight process automation. Power Automate or Logic Apps typically handle this work.

Typical use cases include:

• Notifications sent through Teams, email, or Outlook
• Escalations for SLA breaches
• Reminders for pending or overdue actions
• Document routing
• Non-core business workflows
• Status updates pushed to users without requiring SAP login
• Exception handling for failed or stalled steps

A purchase request, for instance, can be routed straight to a manager in Teams. The manager approves or rejects it from there, without ever logging into the full SAP interface. 

SPFx and SharePoint-based solutions support lightweight, easy-to-use interfaces for occasional users. These users get a simplified screen instead of the full transactional interface.

Final transactional validation must always happen in SAP. Power Automate can orchestrate the process, but SAP must validate and commit. The workflow layer improves speed and user convenience on the Microsoft side, while SAP remains the system that enforces transactional control.

Figure 6: Power Automate integration options for orchestrating SAP workflows

Layer 3: Integration Layer

The integration layer governs how SAP connects with Microsoft and other enterprise systems. The right method depends on the scenario rather than a single default approach.

• Simple read or write access to SAP business objects uses SAP OData.
• Standard SAP transaction execution uses BAPI or RFC through the SAP ERP connector.
• Bulk data extraction uses CDS views, ODP, SLT, or Azure Data Factory, kept on a separate path from live transactional traffic.
• Asynchronous document exchange uses IDoc.
• External API exposure runs through Azure API Management.
• Event-based integration runs through Service Bus or Event Grid.
• On-premises SAP connectivity uses an on-premises data gateway or the SAP Cloud Connector.

Microsoft’s SAP ERP connector relies on RFC and BAPI patterns alongside on-premises gateway connectivity. The SAP OData connector, by contrast, supports SAP data interaction through OData services.

Azure serves as the controlled integration backbone across all of these methods. It keeps system-to-system communication structured, secure, and governed. This replaces the fragmented point-to-point integrations with a single, unified integration architecture. It also ensures consistent, auditable communication between SAP and every external system connected to it.

Layer 4: SAP Core Transaction Layer

SAP remains the authoritative core of enterprise operations. This layer is responsible for all mission-critical transactional and master data functions, including:

• Master data covering material, vendor, and customer records
• Point of sale transactions and retail-level postings
• Financial accounting and postings across General Ledger, Accounts Payable, and Accounts Receivable
• The procurement lifecycle, from requisition to purchase order, goods receipt, and invoice verification
• Inventory and warehouse movements
• Production orders, planning, and execution
• Cost center, WBS element, and internal order validation
• Budget control and commitment tracking
• Tax, compliance, and statutory reporting
• Final audit trails and system of record retention

This is the layer that must remain untouched in terms of core responsibility. No Microsoft component should bypass SAP’s validation logic. Microsoft tools may simplify how users interact with SAP, but they never replace SAP’s transactional authority. This is what protects enterprise financial integrity, compliance structure, and auditability.

Layer 5: Data and Analytics Layer

SAP holds critical operational data, but enterprise analytics should not depend directly on transactional systems. The recommended design follows a clear sequence:

• Extract SAP data through approved methods.
• Land the data in Azure Data Lake or Fabric OneLake.
• Structure it into bronze, silver, and gold layers. (Bronze holds raw ingested data, silver holds data that has been linked, deduplicated, normalized, and cleaned, and gold holds data converted into fact and dimension tables at the schema level.)
• Build semantic models on top of the gold layer.
• Publish Power BI dashboards from those semantic models.
• Apply row-level security, so users see only the data appropriate to their role.
• Monitor refresh performance on an ongoing basis.

Live SAP queries should be avoided for high-volume reporting unless specifically justified. This approach gives noticeably better SAP performance than querying SAP directly from dashboards. High-volume data and high-volume reporting carry real licensing cost, and this layer is built to absorb that load. It reduces reporting pressure on SAP and enables scalable, high-performance analytics across the enterprise.

Layer 6: Document and Collaboration Layer

SAP processes often depend on supporting documents, discussions, and approvals. This layer uses SharePoint, Outlook, and Teams to manage:

• Approval attachments
• Vendor-submitted documents
• Supporting files
• Internal discussions
• Workflow comments
• Process documentation

Document metadata gets linked back to SAP where required, following a consistent pattern. The file itself is stored in SharePoint, its metadata is stored in Dataverse, and the SAP object number is held as a reference connecting the two. SAP receives only the final document URL or reference where that link is needed.

The originals of these documents live in Microsoft, not in SAP. This removes non-transactional load from SAP while improving collaboration efficiency, without breaking traceability between the two systems.

Layer 7: Security and Governance Layer

This layer governs access control, authentication, and enterprise security policies across both SAP and Microsoft environments. Required controls include:

• Microsoft Entra ID single sign-on
• SAP authorization mapping to Microsoft roles
• Least privilege SAP technical users
• Power Platform data loss prevention policies
• Separate Dev, Test, UAT, and Prod environments
• Solution-based application lifecycle management
• Azure Key Vault for secrets and credentials
• Audit logging across both SAP and Microsoft systems
• Monitoring through Application Insights and Log Analytics
• Data retention and archival policies
• Maker and admin governance
• Approval delegation policy
• Segregation of duties checks

This layer is mandatory for enterprise credibility. It ensures users operate within consistent security boundaries regardless of which interface they use. The result is unified identity governance and enterprise-wide security enforcement.

Layer 8: Licensing and Cost Governance Layer

This is the commercial backbone of the architecture. It is the layer that proves whether the redesign actually saves money or simply moves complexity around.

The solution needs a license assessment covering several distinct areas:

• SAP direct named users, meaning who genuinely needs SAP GUI or Fiori access
• SAP indirect named users, meaning who interacts with SAP through Microsoft automation or interfaces without a direct login
• SAP Digital Access, meaning which documents get created by external systems and what that triggers in licensing terms
• Premium connector licensing, required for interfaces that integrate directly with SAP
• Power Automate Premium, required depending on which connectors and flows are used
• Power BI Pro, Premium, or Fabric capacity, required based on sharing patterns, capacity needs, and data volume
• Azure cost across API usage, compute, storage, gateway, and monitoring
• Support cost for the combined SAP and Microsoft integration support model

This is where the business case gets proven. Without this layer, the architecture might be technically sound while leaving the actual cost question unanswered. That gap defeats the purpose of building it in the first place.

Note: This architecture requires an in-depth assessment of Microsoft licensing. The net cost reduction is real, but the actual savings depend heavily on what Microsoft entitlements your organisation already holds.

How the Hybrid Architecture Reduces SAP Cost and Management in Practice

When workloads move to the Microsoft layer in a governed, validated sequence, the cost reduction becomes direct and measurable at each point.

• Approval-only users leave the SAP named user count as their interactions shift to Teams and Power Automate. 
• Report consumers stop drawing on SAP compute and licensing as analytics move to Power BI dashboards built on Azure-hosted data. 
• Vendors and occasional users gain access through lightweight interfaces without needing ERP seats. 
• Azure API Management tracks and governs indirect access, ending the silent accumulation of license consumption. 
• A single governed architecture replaces fragmented integrations, cutting both cost and operational risk. 
• Redistributing infrastructure load away from SAP eases pressure on the core system.

Together, these changes restructure the SAP license footprint around users and workloads that genuinely need ERP access. The core system stabilizes, performance improves, and customization complexity reduces. Maintenance overhead across upgrade cycles decreases. The SAP core enters S/4HANA migration with less customization debt, reduced data volume, and a defined integration architecture already in place.

A Practical Six-Step SAP Optimization Strategy

This work is architectural before it is technical. The sequence determines whether cost reduction holds over time or amounts to a short-term adjustment.

Figure 7: Six-Step Framework for SAP Cost Optimization Without Replacement

Step 1: Audit Actual SAP Usage

Map users into four categories: transactional users, approval-only users, reporting-only users, and occasional or external users. Quantify the license cost each group represents. In most enterprise environments, a significant share of license spend sits with the lightest users.

Step 2: Classify Workloads Against the System Boundary

Divide workloads into core ERP functions and boundary functions. Core functions stay in SAP, and final transactional validation always happens there regardless of where the request originated. Boundary functions such as approvals, document handling, and reporting are candidates for redistribution.

Step 3: Design the Integration Architecture

Define how each workload type connects back to SAP and how authentication maps between the two environments. Establish security and governance at this stage, not after implementation.

Step 4: Validate Microsoft Licensing Before Implementation Begins

Confirm which Power Platform capabilities the organization’s current Microsoft entitlement covers and identify the gaps. Model the per-user cost of Power Automate Premium, Power Apps, and Power BI PPU against the named SAP licenses the organization plans to retire. Substantiate the net savings figure before approving the business case.

Step 5: Reduce the License Footprint as Workloads Migrate

As workloads move to the Microsoft layer in validated phases, approval-only and reporting-only users come off the SAP license count. The reduction is direct and measurable. Getting the boundary right produces SAP license optimization. It does not require a separate vendor negotiation.

Step 6: Allow the Core ERP to Stabilize

With non-transactional workloads removed, SAP carries a load aligned to its architectural purpose. System performance improves, customization complexity reduces, and the maintenance burden across upgrade cycles decreases.

Licensing Considerations Enterprises Should Review Before Implementation

Microsoft 365 provides a proven extension layer for SAP environments. The premium capabilities that enable workload redistribution often require licensing beyond standard Microsoft 365 plans. Organizations should evaluate the following areas before implementation:

• Power Automate Premium for SAP-connected workflows, premium connectors, and advanced automation scenarios.
• Power BI Premium Per User (PPU), Premium Capacity, or Microsoft Fabric Capacity for large-scale reporting, enterprise analytics, and broader dashboard distribution.
• Azure services and integration costs related to API management, storage, monitoring, and data movement.
• SPFx and SharePoint-based applications may require additional Microsoft 365, SharePoint, Azure, or development resources depending on scale and hosting requirements.
• SAP Digital Access implications where external systems create SAP business documents through integrations.

The net savings from retiring SAP named users depend directly on what the organization already holds. Before building the business case, organizations should map existing Microsoft licenses against the architecture’s requirements and identify the gaps. In most enterprise environments, the calculation strongly favors redistribution, but it needs to happen before implementation begins, not after.

Figure 8: Licensing Areas to Assess Before SAP Cost Optimization

When Enterprises Should Act on SAP Optimization

Several indicators point to the right time to undertake boundary design and workload redistribution.

• SAP named user license consumption has grown beyond the transactional core into approval-only and reporting-only populations. 
• Reporting and analytics workloads run directly inside SAP BW or through custom ABAP development. 
• Integration complexity with external systems is increasing and generating indirect license consumption that is difficult to track. 
• Customisation and maintenance overhead is compounding ahead of an upgrade or S/4HANA migration cycle. 
• Microsoft 365 is already deployed across the organisation but is not connected to SAP workflows. 
• A contract renewal is approaching that will lock in the current cost structure for another term.

The best time to start is before a renewal cycle locks in the existing cost structure for another term. Savings begin when workloads move, not from when the conversation begins.

How Aufait Technologies Enables SAP Cost Optimization

Aufait Technologies works at the intersection of SAP and Microsoft, which is precisely where this optimization work becomes executable. A SAP consulting firm without Microsoft depth cannot design the external layer. A Microsoft firm without SAP experience cannot determine what is safe to move outside the ERP.

Aufait Technologies has delivered enterprise engagements for Etihad in aviation, working across both environments from the same delivery team. That cross-ecosystem capability is what makes boundary design and workload redistribution work in practice.

Our service capabilities cover the full optimization scope: 

• SAP license usage analysis and identification of non-transactional spend
• Approval workflow migration using Microsoft Power Automate with SAP write-back
• Reporting modernization using Power BI and Microsoft Fabric with certified SAP connectors
• SAP integration architecture using Azure services to replace indirect access patterns
• Enterprise process redesign without disruption to core ERP operations
• Microsoft 365-based operational layer design over existing SAP environments

This optimization work sits alongside a broader set of enterprise solutions we deliver, including document management, procurement management, tender management, HRM systems, and intranet portals. So organizations engaging us for SAP cost optimization can also draw on the same delivery team for the wider systems their operations depend on.

Controlling SAP Costs Is an Architectural Decision

For enterprises running SAP at scale, migration carries operational risk that consistently outweighs its promised value. The practical opportunity lies in managing the cost structure around SAP rather than dismantling it. This is what effective SAP cost management actually looks like in practice. The approach is simple. Drawing a clear boundary between what SAP must own and what the surrounding Microsoft environment should handle, then holding that boundary with discipline.

SAP stays the system of record for master data, financial postings, compliance controls, and final transactional validation. Microsoft and Azure take on what surrounds that core: workflows and approvals, portals for external and occasional users, reporting and analytics, and the integration layer that connects everything back to SAP with full auditability.

Organizations should validate every redistributed workload against SAP licensing as it moves, so the reduction shows up as a measurable outcome rather than an estimate. Most organizations already have the tools to execute this redistribution within their Microsoft 365 subscriptions. What they need is a clear architectural design and a delivery team that understands both sides of the boundary.

👉 Optimize your SAP cost structure using your existing Microsoft ecosystem. Talk to our experts to map your workload redistribution strategy and build a validated business case.

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