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Microsoft is retiring classic SharePoint components in phases through 2026, including SharePoint Alerts, SharePoint Add-Ins, and the legacy ACS authentication model. If your HR onboarding, approvals, finance workflows, or intranet pages still depend on classic scripts, add-ins, or alerts, you risk broken processes, governance gaps, and costly last-minute rework. The supported path forward is modern SharePoint + SPFx, Microsoft Graph, Power Platform, and Entra ID, with Microsoft Purview providing the governance layer.
What to do now: Run a focused dependency inventory, prioritize by business criticality, transform vs. rebuild intentionally, modernize governance alongside content, and replace Alerts with modern notification patterns. Start with a risk-based assessment to avoid migrating what you don’t need—and to protect what you can’t afford to break.
In this blog:
- SharePoint Classic Retirement: What Microsoft Is Retiring and Why It Matters
- The Risk of Not Modernizing SharePoint
- 5 Things You Can Do Now to Prepare for the End of SharePoint Classic
- Who Should Be Involved in Your SharePoint Modernization Project
- How Quisitive Helps: Modernization Plus Reduced Risk Across Microsoft
- SharePoint Modernization FAQ
- Microsoft Resources
SharePoint has powered intranets, document management, and business workflows for decades. The challenge is that many organizations still rely on “classic” patterns that were built for an earlier era: custom scripts, legacy add-ins, older authentication, and page experiences that don’t align with modern Microsoft 365 governance.
Microsoft is now finishing the shift. Classic-era components are being retired in phases, and the risk isn’t cosmetic. If classic dependencies are tied to business-critical sites and workflows, you can end up with broken experiences, stalled processes, governance gaps, and a last-minute scramble that costs more and delivers less.
What Microsoft Is Retiring and Why It Matters
Microsoft has published specific retirement timelines for legacy SharePoint functionality. A simple example that many teams still depend on is SharePoint Alerts. Microsoft has announced a staged retirement that blocks creating new alerts and ultimately retires the feature entirely (with milestones across 2025 and 2026).
More broadly, Microsoft is also retiring SharePoint Add-Ins and the legacy Azure Access Control Service (ACS) model used by many older custom apps and integrations. If you have provider-hosted add-ins, app-only access patterns, or older custom solutions, these dates matter because functionality can stop working if it isn’t remediated.
The direction is consistent: modern SharePoint experiences and modern extensibility (SPFx, Microsoft Graph, Power Platform, Entra ID) are the supported path forward.
The Real Risk: It’s Not a “Modernization Project” Problem, It’s a Business Risk Problem
Classic dependencies usually aren’t isolated to IT. They’re often embedded in how work gets done:
- HR onboarding and policy sites
- Operations approvals and forms
- Finance document workflows
- Department portals, knowledge bases, and intranets
- Project sites with custom web parts or scripts
When classic components fail, the impact tends to show up as business friction first: missing notifications, pages that don’t render properly, broken web parts, failed automation, or security workarounds that create audit headaches later.
There’s also a governance issue: modern Microsoft 365 governance and compliance increasingly rely on Microsoft Purview capabilities like auditing, retention, eDiscovery, and policy-based controls. If your environment is fragmented or anchored in older patterns, you can end up with blind spots right when you’re trying to tighten risk management.
Practical Ways Forward: What to Do Now
A good modernization plan is not “convert everything.” It’s “reduce risk first, modernize with intent.”
1. Run a focused discovery and dependency inventory
Start by identifying:
- Classic pages and templates in use
- Alerts usage patterns and business owners
- Custom scripts (Script Editor / Content Editor usage)
- SharePoint Add-Ins and ACS/app-only access dependencies
- Legacy workflows and where the business still depends on them
If you only do one thing this quarter, do this. You can’t prioritize what you can’t see.
2. Prioritize by business criticality, not site count
Group findings into tiers:
- Tier 1: revenue-impacting, compliance-impacting, or operationally critical
- Tier 2: department productivity and internal services
- Tier 3: low-usage or redundant sites that can be retired instead of migrated
This is where a lot of cost gets avoided: You stop migrating content nobody needs.
3. Decide what gets transformed vs rebuilt
Microsoft provides a clear modernization approach, including in-place modernization and page transformation guidance. Use it, but don’t assume it’s “push-button.”
Rule of thumb:
- Transform straightforward classic pages where fidelity is acceptable
- Rebuild anything tied to complex workflows, custom branding, business apps, or compliance needs
4. Modernize governance at the same time
Modernization is the right moment to reset:
- Information architecture (hubs, navigation, findability)
- Lifecycle management (what gets retained, labeled, disposed)
- Audit and investigation readiness
- Access model and role-based permissions
This is also the moment to align SharePoint with your broader Microsoft risk posture (identity, security, compliance). Purview is often the “missing layer” that turns SharePoint modernization into actual risk reduction.
5. Replace “Alert me” with modern notification patterns
For teams still relying on alerts, treat this as a business workflow conversation:
- What events matter?
- Who needs to be notified?
- What’s the escalation path?
Then migrate to modern approaches (for example, rules or Power Automate patterns), so notifications are more reliable, governed, and reportable.
Who Should Be Involved in Your SharePoint Modernization Project?
SharePoint modernization fails when it’s treated as an IT-only project. You need the right mix:
Platform owners and architects
- Modern Workplace / M365 Owner
- Enterprise Architect (Digital Workplace / Collaboration)
- SharePoint Admin / Engineer
Security, compliance, and risk
- Security leadership (to align access and investigation readiness)
- Compliance / Records (to align retention, eDiscovery, data lifecycle)
Business owners
- HR, Finance, Operations leaders whose processes live in SharePoint
- Power users and site owners (they know what’s truly used)
Delivery and change management
- Power Platform team (for workflow replacement)
- Change management/comms lead (to drive adoption and reduce disruption)
How Quisitive Helps: Modernization Plus Reduced Risk Across Microsoft
Quisitive is not just a SharePoint migration shop. We help organizations modernize SharePoint as part of a bigger outcome: a governed, secure Microsoft 365 platform that reduces risk and supports what comes next (automation, Copilot readiness, better auditability).
Where we typically engage:
- SharePoint Classic Risk and Dependency Assessment to help you evaluate what will break and what you should fix first.
- Modernization Roadmap and Architecture to build your hub strategy and information architecture, and make extensibility decisions.
- Workflow and App Modernization using Power Platform and modern patterns.
- Purview alignment to strengthen auditing, lifecycle controls, and compliance readiness as part of the modernization program.
FAQ: SharePoint Classic Retirement
- What is SharePoint Classic retirement?
Microsoft is deprecating legacy SharePoint components, including Alerts and older extensibility approaches. The long-term support and governance direction is modern SharePoint and Microsoft 365-integrated patterns. - Is this purely an IT issue?
No. Many classic components support critical business processes. Failures or removals can affect operations, compliance, and governance visibility. - Does this affect other Microsoft 365 tools?
Yes. Classic SharePoint components often support Teams sites and Power Platform workflows. Legacy dependencies can impede integration and automation goals. - How long does modernization take?
Timelines vary by environment complexity and business impact. Many organizations use phased modernization over months rather than weeks.
