Microsoft SharePoint migration: challenges, risks & best practices for enterprise projects

Last update: 2026-07-21

Thomas Berger
Senior Consultant

Microsoft SharePoint is often perceived as an easy target platform. It integrates seamlessly with Microsoft 365, supports collaboration through Teams and OneDrive, and has become the default enterprise content platform in many organizations. But migrating to Microsoft SharePoint, especially at scale, is rarely simple.

Behind the familiar interface there are structural limitations, governance considerations, metadata constraints, and operational risks that must be addressed deliberately. Without proper planning, Microsoft SharePoint migration projects can result in permission inconsistencies, metadata breakdown, version sprawl, and long-term storage cost escalation.

Learn the main Microsoft SharePoint migration challenges around permissions, metadata, version histories, throttling, governance, and delta synchronization, and how to reduce risk before execution.

MICROSOFT SHAREPOINT VERSIONS AND SUPPORT LIFECYCLE

The support lifecycle of Microsoft SharePoint platforms is becoming an increasingly important factor in migration planning. With older on-premises versions nearing end of support, organizations are accelerating their transition toward SharePoint Online or modern hybrid architectures.

Platform	Deployment	Support status
SharePoint Online	Cloud SaaS	Evergreen (continuously updated)
SharePoint Server Subscription Edition	On-premises/Hybrid	Currently supported on-prem; rolling updates
SharePoint Server 2019	On-premises	Support ends Jul 14, 2026
SharePoint Server 2016	On-premises	Support ends Jul 14, 2026
Older on-prem versions	On-premises	Already EoL (2013 and earlier)

WHY SHAREPOINT MIGRATIONS ARE MORE COMPLEX THAN THEY SEEM

Microsoft SharePoint migrations are often approached as a technical transfer. In reality, they represent an architectural and governance transformation. When replacing a legacy ECM or DMS platform, organizations need to redefine how information is structured, governed, secured, and managed throughout its lifecycle.

Before migration begins, six key areas should be aligned:

01 | Blogpost | What makes Microsoft SharePoint migrations complex & how to control the risk

Aligning these six areas before migration reduces governance risk and prevents costly remediation later.

These areas define how content is structured, governed, secured, and managed after migration. When they are not addressed upfront, organizations often inherit governance and compliance issues in the new environment.

Bringing these areas together requires input from multiple parts of the organization.The core team should include expertise in the legacy platform, Microsoft SharePoint, migration tools, and business processes, with clear ownership for data preparation. For larger projects, a dedicated migration team helps manage scope, decisions, testing, and coordination. SharePoint administrators should be involved early, since migration choices affect future governance. When migration work runs alongside daily tasks, dependencies and open issues can easily be overlooked.

The target structure should also reflect how SharePoint will be used after the migration. A collaboration environment with large document volumes requires a different design from an application built around detailed metadata, business rules, and relationships between records. Clarifying the intended use early helps determine which source structures can be retained and which should be simplified or redesigned before technical migration rules are defined.

TECHNICAL CONSTRAINTS YOU MUST DESIGN FOR

Performance & throughput
Large SharePoint migrations must account for API throttling, indexing delays, and structural limits. The target platform often becomes the delay point, so migration execution must be scalable and load-controlled.
Structural limits
Microsoft SharePoint enforces constraints, such as the path length, which is limited to ~400 characters, and list view thresholds (~5,000 items). Simply replicating legacy folder structures can result in broken hierarchies or degraded usability. Structural redesign is often required.
Metadata & content types
SharePoint’s architecture (sites, libraries, content types, taxonomies) differs significantly from most legacy ECM systems. Migration therefore requires metadata transformation, not just field mapping. Poor planning here leads to long-term governance issues.
Permissions
Permissions can be applied at multiple levels, with inheritance that is easy to break unintentionally. Incorrect mapping can create audit risks or administrative complexity. Permission validation must be part of migration governance.

BUSINESS RISKS THAT ARE OFTEN UNDERESTIMATED

Volume & data cleanup
Legacy repositories typically contain obsolete content, duplicates, excessive version histories, and inconsistent metadata. Migrating everything “as is” increases storage costs, indexing load, and long-term governance complexity in Microsoft SharePoint. A structured migration should therefore include content rationalization, clear version policies, and metadata cleansing to avoid transferring structural problems into the new platform.

As outlined in this datasheet on optimizing SharePoint migrations, selectively classifying and offloading low-value content during migration can significantly reduce long-term storage costs while maintaining controlled access to required records.
Version sprawl & storage costs
Microsoft SharePoint does not optimize large version histories efficiently at enterprise scale. Migrating full historical versions without review can significantly increase long-term storage consumption and operational overhead. A strategic approach defines which versions are legally required, which are operationally relevant, and which can be excluded to balance compliance obligations with cost control.
Workflow transformation
Legacy workflows rarely translate directly into Microsoft SharePoint. Approval chains, lifecycle states, and automation logic often require redesign rather than technical replication. Organizations must decide whether workflows should be rebuilt, simplified, retired, or replaced with solutions such as Power Automate. Workflow migration is therefore a process transformation exercise, not a simple system conversion.

These assumptions should be tested through representative pilot migrations before the wider rollout begins. The pilot content should reflect realistic volumes, metadata, permissions, versions, and file types, including more complex cases that may expose weaknesses in the mapping rules. The results can then be used to refine the migration plan, estimate throughput, and set more reliable timelines for migration waves and final cutover.

A metadata and permissions assessment can identify inconsistencies early and reduce validation risks later.

MIGRATION APPROACHES THAT WORK IN SHAREPOINT ENVIRONMENTS

ECM platform replacement with delta synchronization
When replacing an existing ECM system, users often need to keep working while migration is in progress. Delta synchronization helps ensure that changes made during this period are captured and reflected in the target environment.

Most content can be transferred during an initial load while users continue working in the source system. Further delta runs then capture documents and metadata added or changed after the first transfer, giving the team time to validate the target and resolve mapping or performance issues before go-live. Shortly before cutover, a limited content freeze and final delta help reconcile the source and target and reduce the amount of work left for the final migration window.

Detecting changed or newly created content.
Capturing updated metadata, versions, and permissions.
Comparing source and target content states.
Synchronizing updates before final cutover.
Reducing the need for content freezes that disrupt daily operations.

Wave-based migration using migration sets
Large SharePoint migrations are easier to manage when content is divided into controlled migration sets, or “migsets,” instead of being moved all at once. This allows organizations to:

Plan department-based migration waves.
Segment content by language, region, or business unit.
Validate each migration set separately.
Improve traceability, reduce risk concentration, and coordinate stakeholders more smoothly.