EPC Group provides enterprise SharePoint migration services for organizations moving from on-premises SharePoint, file shares, or legacy intranets to SharePoint Online. We have completed 6,500+ SharePoint implementations over 29 years. Migrations start at $50,000. Compliance-certified for HIPAA, SOC 2, FedRAMP, and CMMC.
Key Facts
- EPC Group has completed 6,500+ SharePoint implementations over 29 years.
- SharePoint migration pricing: $50,000–$500,000+ depending on scope, data volume, and compliance requirements.
- EPC Group holds core Microsoft Solutions Partner designations.
- Small migrations (under 1 TB) take 4–6 weeks. Enterprise migrations (10 TB+) take 12–16 weeks.
- Modern SharePoint information architecture reduces content discovery time by 60% and helpdesk tickets by 40%.
- Permission consolidation during migration typically reduces unique permission entries by 40–60%.
Enterprise SharePoint Migration Services
11,000+ enterprise engagements. Compliance-ready methodology for healthcare, finance, and government. Fixed-fee accelerators from $35,000.
Editor's note: This ranking is published by EPC Group, which is included in the list. Methodology and weighting follow. Inclusion of EPC Group reflects the publisher's 6,500+ SharePoint implementations; ranking position is determined by the same criteria applied to every other firm.
Enterprise SharePoint Migration: The Definitive Guide
Quick Answer: Enterprise SharePoint migration to SharePoint Online requires a structured methodology covering discovery, architecture, pilot, execution, and validation. EPC Group has migrated 11,000+ engagements across Fortune 500 organizations with fixed-fee accelerators starting at $35,000. Migration timelines range from 4 weeks (under 1TB) to 12 months (20TB+ with compliance requirements). The critical success factor is permission remediation before migration — not during or after.
SharePoint migration failures cost enterprises $100,000-$500,000 in rework, lost productivity, and compliance remediation. The most common causes: inadequate permission analysis, broken workflow dependencies discovered post-migration, and compliance gaps in regulated industries. Our methodology eliminates these risks through systematic pre-migration validation.
EPC Group has delivered SharePoint migration services for 29 years — from SharePoint 2003 through SharePoint Server Subscription Edition to SharePoint Online. We wrote the book on SharePoint migrations (literally — our Microsoft Press publications cover enterprise SharePoint architecture and migration planning).
EPC Group SharePoint Migration Methodology
Discovery & Assessment
- Source environment audit (sites, lists, libraries, permissions)
- Data volume and complexity analysis
- Custom workflow and InfoPath inventory
- Third-party application dependency mapping
- Compliance requirements documentation
- Migration tool selection and licensing
Architecture & Planning
- Target SharePoint Online information architecture
- Site collection and hub site structure design
- Permission model redesign (Entra ID groups)
- Governance framework configuration
- Migration wave planning and scheduling
- Communication and change management plan
Pilot Migration
- Pilot migration of 2-3 representative sites
- Permission validation and user acceptance testing
- Performance benchmarking and timeline validation
- Issue identification and remediation
- Migration runbook finalization
- Stakeholder sign-off on approach
Full Migration Execution
- Parallel migration stream execution
- Incremental sync for active content
- Custom workflow conversion to Power Automate
- InfoPath to Power Apps conversion
- Daily progress reporting and issue triage
- Cutover scheduling and DNS changes
Validation & Optimization
- Content integrity verification (file counts, checksums)
- Permission audit and validation
- Search configuration and verification
- Performance optimization and caching
- User training and adoption support
- Decommission planning for source environment
SharePoint Migration Pricing
| Migration Type | Data Volume | Timeline | Price Range |
|---|---|---|---|
| Quick-Start Migration | Under 1TB, single source | 4-6 weeks | $25,000-$50,000 |
| Standard Enterprise | 1-10TB, multiple sources | 6-12 weeks | $75,000-$200,000 |
| Complex Enterprise | 10-50TB, custom workflows, compliance | 3-6 months | $200,000-$400,000 |
| Large-Scale Enterprise | 50TB+, multi-geo, regulated | 6-12 months | $400,000-$750,000+ |
| Managed SharePoint (Monthly) | Any size, ongoing support | Ongoing | $5,000-$20,000/mo |
SharePoint Migration for Regulated Industries
Healthcare (HIPAA)
- Encrypted data transfer for PHI
- BAA verification for migration tools
- Audit logging of all data movement
- Post-migration PHI access validation
- Sensitivity labels on migrated content
Financial Services (SOC 2)
- Chain of custody documentation
- Migration control validation
- Access control verification
- Data integrity checksums
- Regulatory retention enforcement
Government (FedRAMP)
- GCC/GCC High tenant migration
- FedRAMP-aligned consulting expertise tool selection
- CUI handling procedures
- IL4/IL5 data classification
- NIST 800-53 control mapping
EPC Group SharePoint Migration Track Record
11,000+ engagement scale
Users migrated across platforms
28+
Years of SharePoint expertise
99.9%
Data integrity rate
30-40%
Faster than industry average
5 SharePoint Migration Mistakes That Cost Enterprises $100K+
Migrating broken permissions
Audit and remediate permissions BEFORE migration, not after. Migrating 500 unique permission sets creates an ungovernable mess in SharePoint Online.
Ignoring workflow dependencies
SharePoint 2010/2013 workflows and InfoPath forms do not migrate to Online. Map every workflow, decide: convert to Power Automate, redesign, or retire.
No pilot migration
Always migrate 2-3 representative sites first. Validate permissions, search, metadata, and user experience before committing to full migration waves.
Big-bang cutover
Phased migration with incremental sync reduces risk. Users access both environments during transition. No single weekend where everything must work perfectly.
Skipping user training
Modern SharePoint looks and works differently from classic. Without training, users revert to old habits — emailing files instead of sharing links, saving locally instead of OneDrive.
Related Resources
Frequently Asked Questions
How much does enterprise SharePoint migration cost?
SharePoint migration costs depend on data volume, complexity, and source platform. Small migrations (under 1TB, single source) cost $25,000-$50,000. Mid-scale (1-10TB, multiple sources, custom workflows) cost $75,000-$200,000. Enterprise migrations (10TB+, regulated industries, complex permissions) cost $200,000-$500,000+. EPC Group offers fixed-fee SharePoint Migration Accelerators starting at $35,000 that include assessment, migration planning, execution, and post-migration validation.
How long does a SharePoint Online migration take?
Timeline depends on data volume and complexity: under 1TB takes 4-6 weeks, 1-5TB takes 6-12 weeks, 5-20TB takes 3-5 months, and 20TB+ takes 5-12 months. Factors that extend timelines: complex permission structures, custom workflows requiring Power Automate conversion, third-party application dependencies, and regulatory compliance validation. EPC Group compresses timelines by 30-40% through parallel migration streams and automated pre-flight validation.
What is the best SharePoint migration tool for enterprise?
For enterprise migrations, SharePoint Migration Tool (SPMT) handles basic file share migrations. Microsoft Migration Manager provides centralized management for large-scale migrations. ShareGate and AvePoint are leading third-party tools with advanced features like permission mapping, content filtering, and incremental sync. EPC Group uses a combination of Microsoft-native and third-party tools selected based on source platform, data volume, and compliance requirements.
Should I migrate SharePoint on-premises to SharePoint Online or Microsoft 365?
SharePoint Online (part of Microsoft 365) is the recommended target for most organizations. It eliminates infrastructure management, provides automatic updates, integrates with Copilot and Microsoft 365 services, and supports modern authentication. SharePoint Server Subscription Edition remains viable for organizations with strict data sovereignty requirements or air-gapped environments. EPC Group recommends SharePoint Online for 95%+ of enterprise clients, with Azure Private Link for organizations needing enhanced data isolation.
How do you handle permissions during SharePoint migration?
Permission migration is the most complex aspect of enterprise SharePoint migrations. Our methodology: 1) Pre-migration permission audit and cleanup, 2) Azure AD/Entra ID group mapping, 3) Permission consolidation (reducing unique permissions by 40-60%), 4) Automated permission verification post-migration, 5) SharePoint site collection admin assignment, 6) External sharing policy configuration. We never migrate broken or over-permissioned structures — we fix them first.
Can you migrate SharePoint workflows to Power Automate?
Yes. SharePoint 2010/2013 workflows and SharePoint Designer workflows must be converted to Power Automate for SharePoint Online. Simple approval workflows convert directly. Complex multi-step workflows with custom code require redesign. InfoPath forms convert to Power Apps. EPC Group provides workflow assessment reports identifying which workflows convert directly (typically 60-70%), which need redesign (20-30%), and which should be retired (5-10%).
What compliance considerations exist for SharePoint migration?
Regulated industries must address: HIPAA — ensure PHI handling during migration uses encrypted transfer, verify BAA coverage, maintain audit logs of all data movement. SOC 2 — document migration controls, maintain chain of custody, validate access controls post-migration. FedRAMP — use GCC/GCC High tenant for government data, ensure migration tools are FedRAMP-aligned consulting expertise. GDPR — data residency during migration, right to erasure compliance, data processing agreements. EPC Group includes compliance validation as a standard phase in every regulated migration.
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Enterprise SharePoint Migration Services for 2026
EPC Group provides enterprise SharePoint migration services for organizations moving from on-premises SharePoint, file shares, or legacy intranets to SharePoint Online. We have completed 6,500+ SharePoint implementations over 29 years. Migrations start at $50,000. Compliance-certified for HIPAA, SOC 2, FedRAMP, and CMMC.
Key facts
- EPC Group has completed 6,500+ SharePoint implementations over 29 years.
- SharePoint migration pricing: $50,000–$500,000+ depending on scope, data volume, and compliance requirements.
- EPC Group holds core Microsoft Solutions Partner designations.
- Small migrations (under 1 TB) take 4–6 weeks. Enterprise migrations (10 TB+) take 12–16 weeks.
- Modern SharePoint information architecture reduces content discovery time by 60% and helpdesk tickets by 40%.
- Permission consolidation during migration typically reduces unique permission entries by 40–60%.
EPC Group SharePoint Migration Methodology
Every EPC Group migration follows a five-phase delivery process. Each phase has defined deliverables and sign-off gates before proceeding.
Discovery and Assessment
- Content inventory and classification across all source environments.
- Permission audit and cleanup — identify orphaned accounts and over-permissioned groups.
- Compliance requirement identification — HIPAA, SOC 2, FedRAMP, or CMMC controls required.
- Migration tooling selection — ShareGate, AvePoint, or Microsoft native tools based on scale.
Architecture and Planning
- Hub-spoke information architecture design — 1 root hub per business unit, 5–15 spoke sites per hub.
- Mega-menu navigation tied to Viva Connections.
- Sensitivity-label-driven sharing controls applied at the site level.
- Azure AD/Entra ID group mapping for permission migration.
Pilot Migration
- 10–15% of content migrated in pilot phase.
- Validation against source content for completeness and permission accuracy.
- Performance baseline established for full migration wave planning.
Full Migration Execution
- Wave-based migration — content moved in priority order (active first, archive last).
- Permission consolidation — reduces unique permissions by 40–60%.
- Automated permission verification after each wave.
- External sharing policy configuration per site.
Validation and Optimization
- Content completeness audit against source inventory.
- Sensitivity label coverage verification — target 100% within 90 days.
- Search index validation and Copilot grounding quality testing.
- User adoption training and helpdesk handoff.
SharePoint Migration Pricing
EPC Group publishes fixed-fee pricing ranges. Price depends on data volume, source environment complexity, and compliance requirements.
- Small migration (under 1 TB, single site collection): $50,000–$100,000.
- Mid-size migration (1–10 TB, multiple site collections): $100,000–$250,000.
- Large enterprise migration (10+ TB, 10,000+ users): $250,000–$500,000+.
- Tenant-to-tenant migration: add 20–30% to scope for cross-tenant identity work.
- File share to SharePoint migration: $50,000–$150,000 depending on volume and metadata complexity.
SharePoint Migration for Regulated Industries
Healthcare (HIPAA)
- Business Associate Agreement (BAA) executed before any PHI content migration.
- Sensitivity labels applied to all PHI-containing libraries before migration.
- External sharing restricted at the tenant and site level.
- Audit logging enabled for all PHI document access post-migration.
Government (FedRAMP / CMMC)
- GCC or GCC High tenant required depending on data classification.
- Tenant-to-tenant migration from commercial M365 to GCC High: 12–24 weeks.
- CMMC Level 2/3 information architecture controls applied during migration.
Financial Services (SOC 2)
- Document retention policies configured per FINRA and SEC requirements.
- eDiscovery hold configuration during and after migration.
- Audit trail continuity — no gap in logging between source and destination.
Modern SharePoint Information Architecture
The hub-spoke architecture is the 2026 standard for enterprise SharePoint. It improves content discovery and governance.
- 1 root hub per business unit (IT, HR, Finance, Operations).
- 5–15 spoke sites per hub.
- Mega-menu navigation tied to Viva Connections home site.
- Sensitivity-label-driven sharing controls at the site container level.
- Results: 60% faster content discovery, 40% fewer "where do I save this?" helpdesk tickets.
Frequently asked questions
How much does a SharePoint migration cost?
Small migrations (under 1 TB) cost $50,000–$100,000. Mid-size migrations (1–10 TB) cost $100,000–$250,000. Large enterprise migrations (10+ TB, 10,000+ users) cost $250,000–$500,000+. Compliance complexity adds 20–30%.
How long does a SharePoint migration take?
Small migrations take 4–6 weeks. Mid-size migrations take 8–12 weeks. Large enterprise migrations take 12–16 weeks with phased wave execution. Tenant-to-tenant migrations to GCC High take 12–24 weeks.
What tools do you use for SharePoint migrations?
EPC Group selects tools based on environment complexity. ShareGate handles permission preservation in hub-spoke architectures. AvePoint Migrator handles enterprise scale with regulated-industry compliance reporting. Microsoft native tools are used for in-place tenant scenarios.
Can you migrate to GCC High for CMMC compliance?
Yes. EPC Group performs tenant-to-tenant migrations from commercial Microsoft 365 to GCC High. This includes identity migration, data migration, permission remapping, and CMMC Level 2/3 information architecture controls.
What is SharePoint permission consolidation?
Permission consolidation is the process of reducing unique SharePoint permission entries during migration. EPC Group typically reduces unique permissions by 40–60%. This improves Copilot grounding quality and reduces security risk.
Schedule a migration assessment
Talk to an EPC Group SharePoint architect about your migration scope, timeline, and compliance requirements. Call (888) 381-9725 or request a 30-minute discovery call.