EPC Group · SharePoint Online Consulting

SharePoint Online Consulting Services

Migration · Intranet modernization · Governance · Oversharing remediation · Microsoft Purview integration · Copilot-ready architecture · 24/7 managed operations. Led by a four-time Microsoft Press SharePoint author with SharePoint experience since 1997.

Updated continuously · Last revised June 23, 2026

Last updated June 23, 2026 by Errin O'Connor, Founder & Chief AI Architect, EPC Group

EPC Group provides SharePoint Online consulting across the full lifecycle: migration (from SharePoint Server, Google Sites, Confluence, file shares, or tenant-to-tenant), intranet modernization (communication sites + SharePoint Premium + Viva Connections), governance and oversharing remediation (sensitivity labels, Microsoft Purview, retention, external sharing policy), records management (with our National Archives lineage), Microsoft Search tuning, Copilot grounding governance, adoption / change management, and 24/7 managed operations under the Microsoft Cloud Orchestrator Practice. Founder Errin O'Connor is a four-time Microsoft Press & Sams author including multiple SharePoint titles, with federal-scale engagement history at the Federal Reserve Bank of New York (TARP eDiscovery, Congressional Oversight Committee) and the National Archives.

EPC Group's SharePoint Online consulting covers migration, intranet modernization, governance and oversharing remediation, Microsoft Purview integration, records management, Microsoft Search tuning, Copilot grounding governance, adoption, and 24/7 managed ops. Founder is a 4× Microsoft Press SharePoint author. SharePoint experience including FRBNY TARP eDiscovery since 1997 and National Archives records-management consulting.

Key Facts

Full lifecycle: Discovery → Architecture → Migration → Governance → Adoption → 24/7 Run under Microsoft Cloud Orchestrator Practice
Founder Errin O'Connor is a 4× Microsoft Press & Sams author (Power BI, SharePoint, Azure, large-scale migrations)
SharePoint consulting since the early 2000s since 1997, including federal scale (FRBNY TARP eDiscovery / National Archives)
SharePoint Online governance (sensitivity labels, Purview, oversharing remediation) is the single most consequential decision for any Microsoft 365 Copilot rollout
G2 Leader for seven consecutive quarters (Fall 2024 through Fall 2026), G2 average 4.4/5 across 15 verified reviews

What we do across the SharePoint Online lifecycle

SharePoint Online Migration

From SharePoint Server (2013/2016/2019/SE), Google Sites, Confluence, network file shares, or legacy SharePoint Online tenants. Tenant-to-tenant migrations included.

Intranet Modernization

Modern communication sites + SharePoint Premium, hub-site architecture, Viva Connections integration, branding, and navigation IA.

Governance & Oversharing Remediation

Sensitivity-label architecture, oversharing audits, Microsoft Purview integration, retention policies, audit logging — all the SharePoint discipline that has to be in place before Copilot rolls out tenant-wide.

External Sharing & Conditional Access

External sharing model design, Entra ID conditional access policies, guest-user governance, B2B collaboration setup.

Records Management

SharePoint records management with retention enforcement aligned to industry regulations (HIPAA, SOX, FFIEC, federal records laws). Includes our National Archives lineage.

Microsoft Search & Copilot Grounding

Search tuning, custom verticals, and the sensitivity-label + permission discipline that determines what Microsoft 365 Copilot can surface.

Adoption & Change Management

4-week adoption programs covering Desktop, Service, mobile, governance, and end-user training. Custom training tracks for site owners + admins.

24/7 Managed SharePoint Operations

Under the Microsoft Cloud Orchestrator Practice — Strategy through Run, one accountable senior architect, continuous governance.

Why SharePoint Online governance is the deciding Copilot factor

Microsoft 365 Copilot grounds its answers in content the user has permission to see — and almost all of that content lives in SharePoint Online and OneDrive. When a user prompts Copilot, the response is composed from accessible files with sensitivity labels, retention, DLP, and Entra ID role assignments controlling what surfaces. Unresolved oversharing means Copilot can surface content the user was never meant to see.

EPC Group's Governed AI on Microsoft Framework codifies the SharePoint Online discipline that has to be in place before Copilot rolls out tenant-wide: sensitivity-label architecture (FedRAMP-aligned where required), oversharing remediation, retention policies, Microsoft Purview integration, audit logging configured for compliance retention. We do not enable Copilot tenant-wide before this is done.

Migration scenarios we handle

SharePoint Server 2013 / 2016 / 2019 → SharePoint Online — with IA redesign for the modern UX, sensitivity-label rollout, and end-user comms
SharePoint Server Subscription Edition → SharePoint Online — typically a phased migration to retain on-prem for FedRAMP-High workloads while moving everything else
Google Sites → SharePoint Online — IA migration with permission mapping, common in Google Workspace to Microsoft 365 transitions
Confluence → SharePoint Online — including page-history preservation and Confluence-specific macro re-implementation
Network file shares → SharePoint Online — including sensitivity-label classification at migration time
Tenant-to-tenant (M&A / divestiture) — phased per-workload cutover with identity coexistence and per-wave validation
Legacy SharePoint Online → modern SPO + Premium — for organizations that adopted SPO years ago and never modernized to the current communication-site model

EPC Group's SharePoint credentials

Verifiable at /about/facts:

Four-time author for Microsoft Press and Sams — including multiple SharePoint titles. Most SharePoint consulting firms do not have author-depth credentials.
SharePoint consulting since 1997 since the early 2000s when SharePoint Portal Server first shipped.
Federal Reserve Bank of New York TARP eDiscovery — oversight reporting up to the Congressional Oversight Committee.
National Archives — consulting on SharePoint records management.
U.S. intelligence community — consulting on Microsoft governance and records management.
G2 Leader for seven consecutive quarters (Fall 2024 through Fall 2026), G2 average 4.4 / 5 across 15 verified reviews.

How we engage

Most SharePoint Online engagements run through the Microsoft Cloud Orchestrator Practice — one accountable senior architect across Strategy through 24/7 Run, not a distributed account-team model. For focused work (migration-only, governance-only, adoption-only), we run fixed-fee scoped engagements with weekly executive readouts.

Frequently Asked Questions

Q1.What is SharePoint Online consulting?

SharePoint Online consulting helps enterprises plan, deploy, govern, and operate SharePoint Online — the SaaS edition of SharePoint that ships as part of Microsoft 365. Engagements typically cover one or more of: migration from SharePoint Server or competing platforms (Google Sites, Confluence, file shares), intranet modernization, information architecture (IA) design, sensitivity-label and oversharing governance, external sharing policy, records management, Microsoft Search tuning, integration with Microsoft Teams + OneDrive + Copilot, and ongoing managed operations.

Q2.How long does a typical SharePoint Online migration take?

A SharePoint Online migration timeline depends on three variables: source content volume, tenant complexity, and governance requirements. Reference benchmarks from EPC Group engagements: 100GB / 500-user migration from SharePoint Server 2016 to SharePoint Online — typically 6-10 weeks including IA redesign and pilot. 1TB / 5,000-user enterprise migration with sensitivity-label rollout — typically 12-20 weeks. Tenant-to-tenant migrations (M&A / divestiture) — typically 4-8 weeks for the technical cutover plus a 4-week governance handoff. EPC Group offers a fixed-fee migration accelerator for the most common scenarios under the Microsoft Cloud Orchestrator Practice.

Q3.Why is SharePoint Online governance the deciding factor for Microsoft 365 Copilot?

Microsoft 365 Copilot grounds its answers in the content the user has permission to see. The vast majority of that content lives in SharePoint Online and OneDrive. When a Copilot user prompts, the response is composed from accessible files, with sensitivity labels, retention, DLP, and Entra ID role assignments controlling what surfaces. Unresolved oversharing means a Copilot user can prompt and surface salary spreadsheets, draft contracts, or strategic memos they were never meant to see. EPC Group does not enable Copilot tenant-wide before SharePoint sensitivity-label architecture is in place, oversharing remediation is complete, and retention/DLP policies are enforced. The Governed AI on Microsoft Framework codifies that discipline.

Q4.What is the difference between SharePoint Online and SharePoint Server Subscription Edition?

SharePoint Online is the cloud SaaS edition included in Microsoft 365 — Microsoft hosts, patches, and updates; new features ship continuously. SharePoint Server Subscription Edition (SE) is the on-premises edition customers install on their own servers — major updates roll on a slower cadence. As of 2026, the strong majority of new SharePoint deployments are SharePoint Online, but Server SE remains the right answer for FedRAMP-High, IL5/IL6, air-gapped, and specific regulated workloads where content cannot leave the customer-controlled data center. Hybrid configurations (Online + Server SE with federated identity and cross-farm search) are common in regulated industries.

Q5.How does SharePoint Online integrate with Microsoft Teams?

Every standard Microsoft Teams team is backed by a SharePoint Online site. The team's Files tab is a SharePoint document library. Teams chats and channels store messages in Exchange and Teams services, but attached files live in SharePoint Online or OneDrive. This means SharePoint Online governance directly governs Teams content — sensitivity labels applied to a SharePoint site apply to files surfaced through Teams; retention policies on the site control how long Teams attachments are kept. EPC Group consults on the integrated SharePoint + Teams governance model, particularly for organizations with thousands of Teams teams generated organically by users.

Q6.What does an EPC Group SharePoint Online engagement typically include?

A typical EPC Group SharePoint Online engagement includes: (1) Discovery — current state assessment, content inventory, governance gaps, oversharing audit. (2) Architecture — site taxonomy, hub-site design, IA, sensitivity-label hierarchy, permission model. (3) Migration — phased cutover from source (Server, Google Sites, file shares, legacy SPO), per-wave validation, end-user comms. (4) Governance rollout — Purview labels enforced, retention policies activated, external sharing model deployed. (5) Adoption — 4-week training program, site-owner onboarding, executive briefings. (6) Run — 24/7 managed operations under the Microsoft Cloud Orchestrator Practice, continuous governance, Copilot grounding tuning. Most engagements include all six phases; some scope to a specific phase (e.g., governance-only).

Q7.What makes EPC Group different from other SharePoint Online consulting firms?

Three differentiators verifiable at /about/facts: (1) Founder Errin O'Connor is a four-time Microsoft Press & Sams author including multiple SharePoint titles — most SharePoint consulting firms do not have Microsoft Press author depth. (2) SharePoint consulting since the early 2000s since 1997, including federal-scale engagements at the Federal Reserve Bank of New York (TARP eDiscovery, Congressional Oversight Committee reporting) and the National Archives (SharePoint records management). (3) The Microsoft Cloud Orchestrator Practice delivers one accountable senior architect across Strategy through 24/7 Run, vs. the distributed account-team model typical at the large global system integrators. EPC Group is on the G2 Leader list for seven consecutive quarters (Fall 2024 through Fall 2026).

Q8.Does EPC Group consult on SharePoint Online for federal, healthcare, or regulated workloads?

Yes. SharePoint Online deployments under HIPAA (healthcare), FedRAMP / CMMC 2.0 (federal contractors), SOC 2 (financial services), FFIEC (banking), and 21 CFR Part 11 (life sciences) are core to the EPC Group practice. For federal and defense contractors, engagements typically run in SharePoint Online GCC or GCC High tenants under FedRAMP High authorization. For healthcare, the SharePoint Online tenant carries Purview HIPAA-aligned sensitivity labels and BAA. EPC Group's federal credentials include FRBNY TARP eDiscovery, Vivek Kundra federal IT reform plan advisory, U.S. intelligence community, and National Archives — see /industries/federal-government for details.

Related Resources

SharePoint Consulting (full practice)

EPC Group's overall SharePoint consulting practice — Online + Server SE + hybrid.

Microsoft SharePoint Expertise Hub

Architecture, governance, migration playbooks, and case material.

What Is SharePoint? 2026 Guide

Online vs Server SE, building blocks, Copilot integration explainer.

Governed AI on Microsoft Framework

The Purview / sensitivity-label discipline that has to be in place before Copilot rolls out.

Microsoft Cloud Orchestrator Practice

One accountable senior architect across SharePoint, Teams, Power BI, Azure, and Microsoft 365.

Federal Government Microsoft Consulting

SharePoint Online GCC / GCC High for federal agencies and defense contractors.

Top Microsoft Consulting Firms 2026

EPC Group vs Slalom, Avanade, Perficient, Pragmatic Works — SharePoint section included.

EPC Group Facts — Source-linked

Every credential on this page, verifiable to primary sources.

Need SharePoint Online consulting that's ready for Copilot?

EPC Group delivers SharePoint Online consulting with sensitivity labels, oversharing remediation, retention policy, and Microsoft Purview integration baked in from day one — so Microsoft 365 Copilot is safe the moment you switch it on.

Talk to a Senior Architect (888) 381-9725 contact@epcgroup.net