Exchange & Email Migration
Enterprise email infrastructure with SLA-backed uptime
Founded 1997 · in our 30th year11,000+ enterprise engagementsMicrosoft Press bestselling author
Enterprise email infrastructure with SLA-backed uptime
By Errin O'Connor, Founder & Chief AI Architect, EPC Group
EPC Group provides Exchange Server consulting and migration to Exchange Online (Microsoft 365). We handle on-premises Exchange administration, hybrid deployments, tenant-to-tenant migrations, and 24/7 emergency support. Exchange Server 2019 reached end-of-life in October 2025 — contact us to plan your migration.
Enterprise-grade email migration and Exchange consulting backed by since 1997 of Microsoft expertise. From on-premises Exchange to hybrid and full cloud deployments with minimal-disruption migration.
Complete email infrastructure services from assessment to migration to ongoing management
Full migration from on-premises Exchange Server to Exchange Online with zero data loss and minimal user disruption.
Maintain on-premises Exchange while leveraging cloud capabilities. Ideal for compliance requirements and phased migrations.
Enterprise email protection with advanced threat detection, DLP, and compliance configurations for regulated industries.
Migrate from Gmail, Lotus Notes, GroupWise, Zimbra, and other email platforms to Microsoft 365.
Legal hold, compliance archiving, and eDiscovery solutions for regulatory requirements and litigation support.
Ongoing Exchange management, monitoring, troubleshooting, and optimization services.
With Microsoft expertise since 1997 and thousands of successful email migrations, EPC Group delivers enterprise-grade Exchange solutions that minimize risk and maximize productivity.
Users continue working while we migrate their mailboxes in the background
All email, calendars, contacts, and permissions migrated without data loss
HIPAA, SOC 2, FedRAMP, and GDPR compliance configurations
Predictable costs with no hidden fees or scope creep
HIPAA-compliant email migration with encryption, BAA configuration, and PHI protection policies.
SOC 2 compliant email infrastructure with advanced security, archiving, and regulatory retention.
FedRAMP-aligned consulting expertise Exchange Online with GCC/GCC High configurations for federal agencies.
Migration timelines vary by organization size and complexity. Small organizations (under 500 users) typically complete in 2-4 weeks. Mid-size (500-5,000 users) takes 1-3 months. Enterprise migrations (5,000+ users) require 3-6 months with phased rollouts to minimize disruption.
Yes, hybrid Exchange deployments allow you to maintain on-premises Exchange servers while using Exchange Online. This provides flexibility for compliance requirements, gradual migration, and specific workloads that must remain on-premises.
All email, calendar, contacts, and archive data are migrated with full fidelity. We use Microsoft-native tools and proven methodologies with documented data-fidelity checklists and full pre-cutover reconciliation. Users maintain continuous email access throughout the migration process.
Yes, Exchange Online (Microsoft 365) is HIPAA compliant when properly configured with a Business Associate Agreement (BAA). EPC Group specializes in healthcare compliance and ensures proper encryption, DLP policies, and audit logging are configured.
Exchange Online Plan 1 starts at $4/user/month. Exchange Online Plan 2 with archiving and eDiscovery is $8/user/month. Most enterprises choose Microsoft 365 E3 ($36/user/month) or E5 ($57/user/month) for complete productivity suites.
Get a free Exchange migration assessment. Our experts will analyze your current environment and provide a detailed migration roadmap.
EPC Group offers consulting and migration services for Exchange Server to Exchange Online (Microsoft 365). We manage:
Exchange Server 2019 will reach end-of-life in October 2025. Contact us to plan your migration.
EPC Group covers the full Exchange Server and Exchange Online lifecycle.
The right migration approach depends on your mailbox count and business requirements.
| Approach | Best for | Timeline | |---|---|---| | Cutover | Under 150 mailboxes | 1–2 weeks | | Staged | 150–2,000 mailboxes | 4–8 weeks | | Hybrid | 2,000+ mailboxes | 8–16 weeks | | Tenant-to-tenant | M&A, divestiture | 4–12 weeks |Exchange Server 2019 is end-of-life as of October 2025. Running an unpatched mail server creates security and compliance risk.
Yes, Exchange Server 2019 reached its end-of-life in October 2025. After this date, Microsoft will stop releasing security updates.
Organizations that continue to run Exchange Server 2019 on-premises will be:
EPC Group has successfully migrated over 3.7 million mailboxes. These migrations include:
We handle various migration scenarios, including cutover, staged, hybrid, and tenant-to-tenant migrations.
A hybrid Exchange deployment combines on-premises Exchange with Exchange Online. This setup allows users to be listed in a single Global Address List. It also ensures proper mail flow between both environments.
This approach is ideal for large enterprises that are migrating in phases over several months.
Yes, EPC Group configures Exchange Online with a signed Microsoft BAA. We implement several key features to ensure compliance with HIPAA Security Rule requirements for electronic protected health information in email:
Talk to an EPC Group Exchange architect. Call (888) 381-9725 or request a 30-minute discovery call.
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