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

Last updated 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.

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.

  • Accenture (global system integrator) — Global system integrator; its Microsoft work is delivered largely through the Avanade alliance.
  • Avanade (global system integrator, Microsoft-only) — Accenture and Microsoft joint venture headquartered in Seattle; works only on the Microsoft platform.
  • DXC Technology (global system integrator) — Global system integrator with a Microsoft practice centred on legacy modernization.
  • Slalom (regional consultancy, multi-platform) — Seattle-based consultancy that delivers through local-market teams across Microsoft and other platforms.
  • 3Cloud (Azure-focused services firm) — Azure-focused services firm with a data and analytics practice.
  • EPC Group (Microsoft-first specialist) — Houston-based Microsoft consulting firm founded in 1997 holding all six Microsoft Solutions Partner designations; senior-architect-led programs for healthcare, financial services, higher education and defense.
  • Perficient (digital consultancy) — St. Louis digital consultancy with a Microsoft practice.
  • Insight (licensing and procurement specialist) — Solutions integrator and Microsoft Licensing Solution Partner; licensing and procurement alongside services.

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 (2010 through 2019) 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 (2003 through 2019) 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
  • Azure Arc
  • 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. For SharePoint migrations by data volume: under 500 GB takes 2-4 weeks, 500 GB to 5 TB takes 6-12 weeks, and over 5 TB with multiple site collections takes 3-6 months.

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, Lotus Notes migrations to Microsoft 365, 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. For HIPAA migrations we sign the 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, and set up 6-year audit log retention in Microsoft Purview. For FedRAMP and CMMC workloads we deploy to Microsoft GCC or GCC High, configure CMMC Level 2/3 controls during environment setup, and produce System Security Plan (SSP) documentation during the migration project. EPC Group also runs a Microsoft Purview governance sprint as part of every SharePoint migration so that all content is labeled before go-live, with container labels enforcing sharing controls at the site level.

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.

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. Native Microsoft 365 migration tools are limited to in-place scenarios and best for simple migrations; ShareGate is best for permission preservation across hub-spoke architectures with strong audit reporting; AvePoint Migrator provides enterprise scale with regulated-industry compliance reporting and is best for healthcare and government migrations.

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.

Ready to Migrate to the Cloud?

Get a free migration assessment from our team of certified Microsoft cloud experts.

Schedule Migration AssessmentCall: (888) 381-9725

Related Services

Azure Cloud Services

Azure infrastructure, compute, storage, and networking solutions.

Microsoft 365 Consulting

Teams, Exchange, SharePoint, and security configuration.

SharePoint migration services

The enterprise buyer's guide: criteria, the four migration scenarios and partner selection.

Exchange Migration Guide

Step-by-step guide for Exchange to Microsoft 365 migration.

Related Resources

Azure migration consulting: how to choose (2026)

What an Azure migration consultant should cover — the six-phase method, six evaluation criteria and FinOps maturity — and the firms buyers shortlist.

Azure Landing Zone Architecture Guide

Design enterprise Azure landing zones with governance, security, and compliance foundations for large-scale cloud migrations.

Azure Cost Optimization Guide

Reduce Azure spend by 30-40% with reserved instances, right-sizing, and governance policies for enterprise environments.

SharePoint Online Migration Guide 2026

Complete guide to migrating on-premises SharePoint to SharePoint Online with zero downtime strategies.

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Deep-Dive Guides

Related enterprise references from the EPC Group knowledge base:

Documented engagements

Each record publishes a redacted primary-source document — a client purchase order, executed agreement or payment record — with a SHA-256 hash you can recompute, and states what the document does not establish.

All documented client engagements

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