Classic SharePoint
Classic sites, pages, publishing, navigation, branding, and old web parts.
Classic SharePoint to modern Microsoft 365
SharePoint Modernization Services
Modernize classic SharePoint sites, forms, workflows, customizations, and business processes using supported Microsoft 365 architecture.
Assess what should stay, what should change, and what should be retired before rebuilding legacy technology.
Legacy SharePoint
Classic Sites
InfoPath
SharePoint Designer
Custom JavaScript
Legacy Web Parts
Assess
Decide
Retain • Replace • Modernize • Rebuild • Retire
Modern Microsoft 365
Modern SharePoint
SPFx
Power Apps
Power Automate
Microsoft Graph
What happens first
Modernization Review
The first conversation is a focused review of the legacy SharePoint estate, the business processes it still supports, and the modernization decisions needed before rebuild or migration work begins.
Initial consultation is used to understand the legacy estate and determine the appropriate modernization review, assessment, or delivery engagement.
Best for
- Classic SharePoint sites, pages, forms, workflows, or scripts still in use
- Organizations deciding what to retain, replace, modernize, rebuild, or retire
- Teams planning migration where legacy dependencies may affect target design
Who should attend
- IT Director
- Microsoft 365 Lead
- SharePoint Owner
- Solution Architect
What to bring
- Legacy component examples
- Known business-critical forms, workflows, or pages
- Current modernization goals
- Known constraints, owners, and risk concerns
What you get
- Modernization review scope
- Initial legacy-dependency risk direction
- Recommended modernization decision path
- Next-step plan for assessment or delivery
Legacy signals
What Needs Modernization?
Modernization starts by grouping legacy signals into decisions, not by treating every item as a rebuild.
Forms
InfoPath, custom forms, and complex data-entry experiences.
Workflows
SharePoint Designer workflows, approvals, and legacy automation.
Customizations
Script Editor, Content Editor, JavaScript, CSS, JSLink, and legacy web parts.
Integrations
Legacy APIs, authentication patterns, external systems, and hard-coded dependencies.
Information Architecture
Sites, hubs, navigation, metadata, permissions, search, and governance.
Modernization assessment
Before Modernizing, Understand What Exists
The goal is not to recreate every legacy component. The goal is to understand what is still used, what is business-critical, what creates technical risk, and what has a supported Microsoft 365 alternative.
Assessment sequence
The sequence keeps modernization decisions tied to evidence instead of defaulting every legacy item to a rebuild.
- 01Inventory
- 02Dependency analysis
- 03Business value
- 04Technical risk
- 05Modernization decision
Legacy Experience
- Sites
- Pages
- Publishing
- Navigation
- Branding
Forms & Automation
- InfoPath
- Designer workflows
- Custom forms
- Approvals
Custom Engineering
- JavaScript
- Legacy web parts
- APIs
- SPFx
- Integrations
Architecture & Governance
- Information architecture
- Permissions
- Ownership
- Lifecycle
- Supportability
Decision framework
Every Legacy Component Needs a Decision
Modernization decisions should be driven by business value, technical risk, usage, supportability, and target architecture, not technology age alone.
Retain
Already modern, supported, and valuable.
Replace
A supported Microsoft 365 capability already meets the requirement.
Modernize
The capability remains useful but should move to supported architecture.
Rebuild
The business requirement remains, but the implementation needs redesign.
Retire
The component is obsolete, duplicated, unused, or no longer worth maintaining.
- 01Legacy component
- 02Is it still required?
- 03What business value does it provide?
- 04Is there a supported native option?
- 05Does custom engineering remain justified?
- 06Retain / Replace / Modernize / Rebuild / Retire
Technology paths
Legacy Technology Paths
These are assessment paths, not automatic conversions.
Classic estate
Classic to Modern SharePoint
Classic pages, navigation, branding, and old web parts are assessed before choosing modern pages, hub architecture, native components, SPFx, or retirement.
Current
Classic SharePoint
Target
Modern SharePoint
- 01Classic SharePoint
- 02Inventory + dependencies
- 03Modern architecture
- 04Modern SharePoint
Assess
Classic pagesPublishing sitesLegacy navigationLegacy brandingOld web partsMaster pages
Modern options
Modern pagesHub sitesModern navigationNative web partsSPFxMicrosoft 365 theming
InfoPath Modernization
InfoPath forms are reviewed for data, rules, security, attachments, approvals, integrations, external users, and offline needs before selecting a target.
- 01InfoPath
- 02Understand form + data + rules + workflow
- 03Select modern architecture
- 04Modern forms / Power Apps / supported solution
Designer Workflow Modernization
Workflow modernization starts with business process discovery. There is no universal one-to-one automatic conversion.
- 01Designer workflow
- 02Business process discovery
- 03Triggers + logic + approvals + integrations
- 04Power Automate / supported alternative
JavaScript to Supported Components
Script Editor and custom JavaScript are checked for DOM manipulation, API calls, hard-coded URLs, authentication, and supportability.
- 01Legacy script
- 02Dependency review
- 03Target pattern
- 04Supported component
- 05Secure validation
Modern architecture options
SPFx, Power Apps, and Power Automate Are Options, Not Defaults
The target architecture should fit the requirement, support model, data, permissions, and governance needs.
Custom experience
SPFx
Use supported custom engineering when native Microsoft 365 capabilities cannot meet the experience or integration requirement.
Best fit
Custom SharePoint UI, extensions, Graph or API-backed experiences.
Avoid if
A native web part or configuration already solves the requirement.
Custom web partsApplication CustomizersListView Command SetsReactTypeScriptFluent UIPnPjsSharePoint RESTMicrosoft GraphExternal APIs
Business app
Power Apps
Use Power Apps for forms, request apps, and task-focused interfaces where business users need a governed app experience.
Best fit
Form replacement, mobile entry, approvals, and SharePoint-connected apps.
Avoid if
The need is only a content page, navigation change, or custom web part.
Request appsEmployee appsData entryApproval interfacesMobile scenariosSharePoint-integrated appsDataverse where appropriate
Process automation
Power Automate
Use Power Automate when the process has clear ownership, connection governance, monitoring, and error handling.
Best fit
Approvals, notifications, document processes, and integration flows.
Avoid if
The process requires unmanaged personal connections or no support owner.
- 1Business event
- 2Trigger
- 3Business logic
- 4Connected services
- 5Controlled outcome
OwnershipConnectionsService accountsEnvironment variablesError handlingMonitoringGovernanceALM
Information architecture
Modernization Is More Than Code
Site architecture, hubs, navigation, metadata, permissions, lifecycle, and governance shape the long-term user experience.
Reduce sprawl
Improve findability
Clarify ownership
Architecture decisions
Design the Target Before Rebuilding
- 1Legacy structure
- 2Simplify
- 3Modern information architecture
- 4Validate access
- 5Govern
Structure
Site architectureHubsLibraries
Findability
NavigationMetadataContent types
Access
PermissionsSearchOwnership
Operations
LifecycleGovernanceSupport model
Migration + modernization
There Is No Universal Sequencing Strategy
The correct approach depends on dependencies, business risk, criticality, timeline, migration strategy, and target architecture.
Modernize Before Migration
When legacy dependencies block migration or target design.
Migrate Then Modernize
When supported content can move first and modernization can follow.
Modernize During Migration
When migration is part of a broader modernization program.
Roadmap
Modernization Roadmap
01
Discover
Understand goals and ownership.
02
Inventory
Identify legacy technology.
03
Assess
Review value, risk, usage, and dependencies.
04
Decide
Retain, replace, modernize, rebuild, or retire.
05
Design
Select target architecture.
06
Modernize
Implement agreed changes.
07
Validate
Test functionality, permissions, data, and integrations.
08
Govern
Define ownership, support, and lifecycle.
Engagement output
What You Receive
Modernization work ends with documented decisions and a sequenced plan, not just findings.
Legacy estate inventory
Classic pages, InfoPath forms, Designer workflows, scripts, and integrations catalogued with owners.
Per-component decisions
Migrate, modernize, retire, or rebuild recommendations for each legacy item.
Target architecture
Supported Microsoft 365 architecture for pages, forms, workflows, and customizations.
Prioritized roadmap
Sequenced waves with dependencies and risk order.
Validation approach
How modernized components are tested and signed off.
Prioritization Matrix
Actual decisions require business and technical assessment. This pattern only frames what deserves attention first.
High value + High risk
Prioritize modernization
High value + Low risk
Retain / optimize
Low value + High risk
Consider retirement
Low value + Low risk
Defer / simplify
Security & governance
Modernization Should Improve Supportability
Replacing old technology with a new fragile implementation is not modernization.
Security
Least privilege, permissions, and API access.
Ownership
App owners, flow owners, and service accounts.
Operations
Monitoring, error handling, and environment strategy.
Lifecycle
ALM, deployment, documentation, and governance.
Technical evidence
Inspect the Modernization Thinking
These verified nxtM365 resources are technical guides and reference architecture, not customer case studies or invented proof.
Technical guide
Classic to Modern SharePoint Migration
Classic sites, pages, publishing structures, branding, and old web parts mapped to modern alternatives.
Legacy SharePoint assessment and modernization decision logic.
Sample deliverable
SharePoint Modernization Decision Brief
An illustrative brief showing current-state findings, legacy components, options, risks, and prioritized next actions.
Example modernization decision output, not a real customer engagement.
Reference architecture
Migration Modernization Blueprint
How migration decisions connect to classic SharePoint, forms, workflows, custom code, and target architecture.
Architecture reasoning for migrate, modernize, retire, or rebuild decisions.
Technical guide
Script Editor to SPFx Modernization
How Script Editor and custom JavaScript patterns can be reviewed for SPFx, Graph, REST, and PnPjs targets.
Modern component architecture reasoning for legacy customization.
Reference architecture
SharePoint Information Architecture Blueprint
Site architecture, hubs, navigation, metadata, ownership, lifecycle, and governance as modernization inputs.
Long-term SharePoint structure beyond migration tooling.
Fit
Is This a Good Fit?
Running Classic SharePoint
Sites, pages, publishing, or legacy branding remain in use.
Dependent on InfoPath or Designer
Forms and workflows still support business processes.
Carrying Custom JavaScript
Legacy scripts or web parts are difficult to support.
Planning SharePoint Migration
Legacy dependencies need decisions before or during migration.
Modernizing Business Processes
Manual or legacy SharePoint processes need supported Microsoft 365 architecture.
Maintaining Custom SharePoint Solutions
SPFx or other supported engineering is required where native capability is insufficient.
Scope boundaries
What May Need Separate Scope
The assessment defines what is included. These items are scoped separately when they apply to your environment.
Full tenant migration execution
Content moves are planned here; execution waves are scoped as migration work.
Large custom-app rebuilds
Rebuilds beyond targeted remediation are estimated as separate build scope.
Branding redesign
Visual identity work outside SharePoint implementation needs separate design scope.
Business-process transformation
Process redesign beyond Microsoft 365 implementation is a separate engagement.
Managed support
Ongoing operations continue under a support agreement when one is defined.
Buyer FAQ
Questions Before You Book
Do we need to modernize everything in Classic SharePoint?
No. Each component should be assessed for business value, technical risk, usage, supportability, and target architecture before deciding whether to retain, replace, modernize, rebuild, or retire it.
Should modernization happen before or after migration?
It depends on dependencies, business risk, criticality, timeline, migration strategy, and target architecture. There is no universal sequencing strategy.
Does every InfoPath form need to become Power Apps?
No. InfoPath forms should be assessed for data, rules, integrations, security, attachments, approvals, users, and supportability before selecting a modern architecture.
Can SharePoint Designer workflows be converted automatically?
Not reliably. Workflow modernization starts with business process discovery, triggers, logic, approvals, integrations, ownership, and governance.
When should we use SPFx instead of native SharePoint?
Use SPFx when native Microsoft 365 capabilities are insufficient and a supported custom SharePoint or Teams experience is justified.
Can you assess our legacy SharePoint environment first?
Yes. The modernization entry point is an assessment that inventories what exists and maps components to retain, replace, modernize, rebuild, or retire decisions.
Can migration and modernization be handled together?
Yes, but the sequence should be deliberate. Some dependencies should be handled before migration, while others can follow after content moves.
How do we start?
Start with a modernization requirements discussion so the legacy estate, dependencies, and target architecture can be scoped before implementation.
Next step
Still Running Legacy SharePoint?
Understand what should stay, what should change, and what should be retired before investing in modernization.