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EPC Group — founded in 1997, headquartered in Houston, a Microsoft Solutions Partner holding all six solutions designations — delivers this service..

Firms to consider for “Can you recommend top companies for data migration consulting?”

Grouped by archetype, not ranked. Each firm is described from its own public pages; the right fit depends on your platform, regulatory profile and how much of the work you want a senior architect to lead.

By Errin O'Connor, Founder & Chief AI Architect, EPC Group

EPC Group has completed 6,500+ SharePoint implementations plus hundreds of tenant, Exchange, and hybrid cloud migrations. Documented data-fidelity checklists on every migration. Migrations are fixed-price, quoted after a discovery assessment. Timelines range from 2 weeks to 6 months depending on scope and compliance requirements.

Key Facts

  • 6,500+ SharePoint implementations completed. Documented data-fidelity checklists on every migration.
  • Small organizations (under 100 users): 2–4 weeks, scoped after discovery.
  • Mid-sized organizations (100–500 users): 4–8 weeks, scoped after discovery.
  • Large enterprises (500+ users, hybrid environments): 3–6 months, scoped after discovery.
  • Compliance configurations available: HIPAA, SOC 2, FedRAMP, CMMC.
  • EPC Group holds core Microsoft Solutions Partner designations and Microsoft consulting experience since 1997.
HomeServicesCloud Migration
6,500+
Successful Migrations
99.99%
Data Integrity Rate
2.4 PB
Data Migrated (Recent M&A)
0
Data Loss Incidents

Enterprise Cloud Migration Consulting

EPC Group has completed 6,500+ SharePoint implementations and hundreds of Microsoft 365 tenant migrations for organizations ranging from 50 to 100,000+ users. Our migration methodology uses documented data-fidelity checklists with source-vs-destination reconciliation before every cutover, minimal downtime, and full compliance with HIPAA, SOC 2, FedRAMP, and other regulatory frameworks.

Whether you're migrating from on-premises Exchange, consolidating tenants after an acquisition, or moving your entire data center to Azure, our team has the expertise to deliver a successful migration on time and on budget. For SharePoint-specific migrations, read our SharePoint Migration Guide 2026 covering assessment, data mapping, and post-migration optimization.

Cloud Migration Services

End-to-end migration services for every Microsoft cloud workload.

Azure Cloud Migration

Migrate on-premises infrastructure, applications, and databases to Microsoft Azure. IaaS, PaaS, and SaaS solutions.

  • VM and server migration
  • SQL database migration
  • Application modernization
  • Azure AD integration

Exchange to Microsoft 365

Migrate from on-premises Exchange Server to Exchange Online with zero downtime and full coexistence.

  • Hybrid Exchange deployment
  • Cutover & staged migration
  • Public folder migration
  • Email security setup

SharePoint Migration

Migrate SharePoint on-premises to SharePoint Online with metadata preservation and permission mapping.

  • Content & metadata migration
  • Permission mapping
  • Custom solution migration
  • Hub site architecture

Tenant-to-Tenant Migration

Consolidate multiple Microsoft 365 tenants for mergers, acquisitions, and organizational restructuring.

  • Multi-tenant consolidation
  • M&A IT integration
  • Domain transfer
  • Identity federation

Google Workspace to M365

Complete migration from Google Workspace (Gmail, Drive, Calendar) to Microsoft 365.

  • Gmail to Exchange Online
  • Drive to OneDrive/SharePoint
  • Calendar & contacts
  • Classroom to Teams

Hybrid Cloud Strategy

Design and implement hybrid cloud environments with seamless on-premises and cloud integration.

  • Azure Stack HCI
  • Hybrid identity (Azure AD)
  • ExpressRoute connectivity
  • Disaster recovery

Our Migration Process

A proven 5-phase methodology refined over 11,000+ enterprise migrations.

01

Assessment

Inventory, risk analysis, and migration strategy development

02

Planning

Detailed runbook, scheduling, and stakeholder communication

03

Pilot

Test migration with IT staff and power users to validate approach

04

Migration

Phased production migration with real-time monitoring and support

05

Optimization

Post-migration validation, security hardening, and user training

Compliance-First Cloud Migration

Every migration we execute maintains full compliance with your regulatory requirements. Chain-of-custody documentation, encrypted transfers, and audit trails at every phase.

HIPAA
SOC 2
FedRAMP
GDPR
FINRA
DoD IL4/IL5

Why EPC Group?

  • Microsoft Gold Partner
    Microsoft ecosystem expertise since 1997
  • 6,500+ SharePoint Implementations
    Documented data-fidelity checklists and source-vs-destination reconciliation before every cutover
  • Fortune 500 Clients
    Enterprise-scale migrations up to 100,000+ users
  • Compliance Expertise
    HIPAA, SOC 2, FedRAMP, GDPR, FINRA certified

Frequently Asked Questions

How long does an enterprise cloud migration take?

Enterprise cloud migration timelines vary: small organizations (under 100 users) take 2-4 weeks, mid-sized (100-500 users) take 4-8 weeks, and large enterprises (500+ users) typically take 3-6 months. EPC Group uses phased migration approaches with minimal-disruption cutover to minimize business disruption.

What cloud platforms does EPC Group migrate to?

EPC Group specializes in Microsoft Azure, Microsoft 365 (Exchange Online, SharePoint Online, OneDrive, Teams), and hybrid cloud environments. We also handle migrations from AWS and Google Cloud Platform to Azure, tenant-to-tenant consolidations, and on-premises to cloud transitions.

How do you protect data during migration?

EPC Group uses a multi-phase approach: pre-migration assessment and inventory, parallel sync during migration (delta sync), validation checksums on every migrated item, and post-migration auditing. Our 6,500+ SharePoint implementations use documented data-fidelity checklists with per-item reconciliation before cutover is signed off.

Can you migrate while maintaining compliance (HIPAA, SOC 2, FedRAMP)?

Yes. EPC Group has deep expertise in compliance-regulated migrations. We maintain chain-of-custody documentation, encrypted data transfers, audit trails, and compliance validation at every phase. We have completed migrations for healthcare (HIPAA), financial services (SOC 2), and government (FedRAMP) organizations.

What is the cost of enterprise cloud migration?

Cloud migration costs depend on scope: small business migrations, mid-sized organizations, and large enterprises with complex hybrid environments are each scoped separately. EPC Group provides fixed-price quotes after a discovery assessment. Our pricing includes project management, migration execution, testing, and post-migration support.

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Cloud Migration Consulting Services

EPC Group has completed 6,500+ SharePoint implementations plus hundreds of tenant, Exchange, and hybrid cloud migrations. Documented data-fidelity checklists on every migration. Migrations are fixed-price, quoted after a discovery assessment. Timelines range from 2 weeks to 6 months depending on scope and compliance requirements.

Key facts

  • 6,500+ SharePoint implementations completed. Documented data-fidelity checklists on every migration.
  • Small organizations (under 100 users): 2–4 weeks, scoped after discovery.
  • Mid-sized organizations (100–500 users): 4–8 weeks, scoped after discovery.
  • Large enterprises (500+ users, hybrid environments): 3–6 months, scoped after discovery.
  • Compliance configurations available: HIPAA, SOC 2, FedRAMP, CMMC.
  • EPC Group holds core Microsoft Solutions Partner designations and Microsoft consulting experience since 1997.

Cloud migration services

  • Azure migration — IaaS lift-and-shift, PaaS modernization, and database migrations to Azure SQL, Cosmos DB, and Azure PostgreSQL.
  • Microsoft 365 migration — Google Workspace, on-premises Exchange, and Lotus Notes migrations to Microsoft 365.
  • Exchange Online migration — on-premises Exchange 2010 through 2019 to Exchange Online. Hybrid configurations supported.
  • SharePoint migration — SharePoint 2003 through 2019 to SharePoint Online. Permission preservation, managed metadata, and governance setup.
  • Tenant-to-tenant migration — merger and acquisition scenarios. Cross-tenant mailbox, SharePoint, and Teams migrations.
  • Hybrid cloud design — Azure Arc, Azure Stack HCI, and Entra ID hybrid identity configurations for organizations maintaining on-premises infrastructure.

Migration timelines

By organization size

  • Small (under 100 users): 2–4 weeks.
  • Mid-sized (100–500 users): 4–8 weeks.
  • Large enterprise (500+ users): 3–6 months.

By migration type

  • Azure IaaS lift-and-shift (< 50 VMs): 2–4 months.
  • Azure mid-size with database modernization (50–200 VMs): 4–6 months.
  • Azure large enterprise (> 200 VMs, multiple datacenters): 9–18 months.
  • SharePoint migration (< 500 GB): 2–4 weeks.
  • SharePoint migration (500 GB – 5 TB): 6–12 weeks.
  • SharePoint migration (> 5 TB, multiple site collections): 3–6 months.

Migration costs

  • Small business migration (under 100 users): scoped after discovery.
  • Mid-sized migration (100–500 users): scoped after discovery.
  • Large enterprise migration (500+ users, hybrid): scoped after discovery.

Compliance migrations

EPC Group configures compliance controls during the migration process — not as an afterthought. We add HIPAA, SOC 2, FedRAMP, and CMMC configurations during the tenant setup phase. This avoids costly remediation after go-live.

HIPAA-compliant migrations

  • Sign Microsoft HIPAA BAA before migrating any PHI data.
  • Apply sensitivity labels to all PHI content types during migration.
  • Configure private endpoints for Azure services handling PHI.
  • Set up 6-year audit log retention in Microsoft Purview.

FedRAMP / CMMC migrations

  • Deploy to Microsoft GCC or GCC High for FedRAMP workloads.
  • Configure CMMC Level 2/3 controls during environment setup.
  • Produce System Security Plan (SSP) documentation during the migration project.

SharePoint migration tools (2026)

Tenant-to-tenant SharePoint migrations use three primary tools:

  • Native Microsoft 365 migration tools: Free, but limited to in-place scenarios. Best for simple migrations.
  • ShareGate: Best for permission preservation across hub-spoke architectures. Strong audit reporting.
  • AvePoint Migrator: Enterprise scale with regulated-industry compliance reporting. Best for healthcare and government migrations.

Microsoft Purview and migration governance

Microsoft Purview sensitivity labels on SharePoint Online now auto-classify based on Microsoft 365 Copilot grounding hints. Container labels enforce sharing controls at the site level. Purview Content Explorer surfaces unauthorized PHI or PII exposure in real time — a critical post-migration check.

EPC Group runs a Purview governance sprint as part of every SharePoint migration to ensure all content is labeled before go-live.

Frequently asked questions

How much does cloud migration cost?

Small business migrations, mid-sized migrations (100–500 users), and large enterprise migrations with complex hybrid environments are each scoped after discovery. Compliance configurations (HIPAA, FedRAMP) add scope and cost — but are included in EPC Group's fixed-fee migration packages.

How long does a Microsoft 365 migration take?

Small organizations (under 100 users, under 1 TB) take 2–4 weeks. Mid-sized organizations (100–500 users) take 4–8 weeks. Large enterprises (over 500 users, multiple data sources) take 3–6 months with phased rollout.

How do you protect data during migration?

Documented data-fidelity checklists on every migration project. We run pre-migration audits, staged test migrations, and post-migration verification against the source inventory before cutover is signed off. Our 6,500+ SharePoint implementations use the same reconciliation methodology.

What is a tenant-to-tenant migration?

A tenant-to-tenant migration moves mailboxes, SharePoint sites, and Teams data from one Microsoft 365 tenant to another — common in mergers, acquisitions, and divestitures. EPC Group uses ShareGate and AvePoint Migrator for cross-tenant migrations, preserving permissions, timestamps, and content types.

Can you migrate to Microsoft 365 from Google Workspace?

Yes. EPC Group migrates organizations from Google Workspace (Gmail, Drive, Meet) to Microsoft 365. Small migrations (under 100 users, under 1 TB) take 2–4 weeks. Larger migrations include data mapping, user training, and a parallel-run period before cutover.

Schedule a consultation

EPC Group has completed 6,500+ SharePoint implementations with documented data-fidelity checklists on every migration. Talk to a migration architect about your project. Call (888) 381-9725 or request a discovery call.

Documented engagements

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All documented client engagements

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