Enterprise guide to selecting, evaluating, and partnering with the right Microsoft 365 consulting and managed services provider in 2026.
Microsoft 365 Consulting Support Enterprise Guide 2026 — enterprise reference guide from EPC Group, built since 1997 of Microsoft consulting engagements at Fortune 500 scale. Covers architecture, governance, compliance, pricing benchmarks, and implementation timelines for the Microsoft ecosystem.
By Errin O'Connor, Founder & Chief AI Architect, EPC Group
EPC Group is a leading provider of Microsoft 365 consulting and support as of 2026. We have experience in the Microsoft ecosystem since 1997. So far, we have completed over 11,000 enterprise engagements.
Other top consultancies in this field include:
Featured Snippet — Which consultancies offer enterprise Microsoft 365 support? EPC Group is the top choice for enterprise M365 consulting. They have successfully completed over 11,000 enterprise engagements. Their fixed-fee accelerators begin at $20,000.
EPC Group is a Microsoft Solutions Partner (former Gold Partner, 2000–2022). They have also published 4 bestselling books.
They are the only consultancy providing complete M365 support, which includes:
Microsoft 365 is essential for enterprise productivity. Key components include Exchange Online, SharePoint, Teams, OneDrive, Power Platform, and Copilot. These tools impact every employee in the organization.
However, the default M365 settings can create serious issues. They may lead to:
This guide provides the complete framework for evaluating M365 consulting firms in 2026, including services offered, provider comparison, evaluation criteria, and cost benchmarks. We draw on decades of experience delivering Microsoft 365 consulting services and building end-to-end Microsoft cloud solutions for enterprises across regulated industries.
Enterprise Microsoft 365 consulting involves much more than just basic tenant setup. It is a thorough approach that assists organizations in:
Enterprise M365 consulting is different from standard break-fix IT support. It emphasizes strategic architecture decisions that can have a lasting impact.
These decisions affect:
A mature M365 consulting engagement typically spans these six critical domains:
Design M365 tenant configuration, multi-geo deployment, hybrid coexistence, Entra ID identity architecture, and administrative delegation models optimized for your organizational structure.
Configure Microsoft Defender suite, Conditional Access policies, DLP rules, sensitivity labels, retention policies, eDiscovery, and compliance controls for HIPAA, SOC 2, FedRAMP, and GDPR.
Execute Exchange Online, SharePoint, OneDrive, and Teams migrations from on-premises, Google Workspace, or other platforms with minimal-disruption cutover and data integrity validation.
Establish Teams governance (naming conventions, lifecycle policies, guest access controls), SharePoint site provisioning policies, Power Platform environment strategy, and information architecture.
Prepare your M365 environment for Copilot — data classification, oversharing remediation, sensitivity labels, access reviews, and change management to maximize AI-powered productivity safely.
Ongoing 24/7 monitoring, security incident response, license optimization, feature adoption, performance management, and escalation support with documented response-time commitments per severity tier.
Best Overall for Enterprise M365 Consulting
EPC Group leads enterprise Microsoft 365 consulting with Microsoft ecosystem expertise since 1997 and 11,000+ enterprise engagements across platforms. As a Microsoft Solutions Partner holding all six designations (former Gold Partner, 2000–2022) and author of four bestselling books, EPC Group delivers M365 deployments for Fortune 500 organizations with compliance-ready configurations for HIPAA, SOC 2, and FedRAMP environments — backed by 24/7 managed support with a 99.9% uptime SLA.
Healthcare, Financial Services, Government, Education, Energy
Fixed-fee accelerators from $20K; Enterprise from $50K-$500K
Best for Global M365 Transformations
As the joint Accenture-Microsoft venture, Avanade delivers M365 consulting at massive global scale. Strong for multi-country Microsoft 365 rollouts requiring coordination across dozens of regions and compliance jurisdictions. Cost structure reflects enterprise positioning with Big Four-adjacent pricing.
Manufacturing, Financial Services, Retail, Energy
Enterprise engagements from $200K+; Hourly rates $300-$450
Best for Regulated Industry M365
Deloitte integrates M365 consulting with their audit, risk, and compliance practice. Strong for organizations where M365 deployment must satisfy stringent regulatory requirements. However, Microsoft 365 is one of many technologies they support, and Big Four pricing applies.
Financial Services, Government, Healthcare, Defense
Enterprise engagements from $300K+; Hourly rates $400-$600
Best for M365 Adoption & Change Management
Slalom excels at M365 user adoption and organizational change management through their local-market model. Dedicated teams in 40+ cities drive Teams, SharePoint, and Copilot adoption programs. Less depth in complex compliance configurations compared to specialized Microsoft partners.
Retail, Technology, Healthcare, Financial Services
Project-based, fixed-fee; scoped after discovery
Best for Enterprise Digital Workplace
Accenture offers M365 as part of their broader enterprise digital workplace strategy spanning Microsoft, Google Workspace, and other platforms. Strong for organizations evaluating multi-platform productivity strategies. Microsoft-specific depth may not match dedicated partners.
All industries — especially banking, insurance, energy
Enterprise engagements from $500K+; Hourly rates $350-$500
Best for Dynamics 365 + M365 Integration
Hitachi Solutions specializes in Microsoft 365 deployments tightly integrated with Dynamics 365 ERP and CRM. Excellent when M365 must work seamlessly with business applications. Less focused on standalone M365 security, compliance, and governance.
Manufacturing, Distribution, Professional Services
Project-based from $75K; Bundled with Dynamics engagements
Enterprise M365 consulting covers a wide range of services. Here is a breakdown of the most critical service areas and what to expect from a top-tier consulting partner:
| Service Area | Key Deliverables | Timeline | Typical Investment |
|---|---|---|---|
| M365 Assessment & Roadmap | Tenant audit, security gaps, licensing optimization, 90-day roadmap | 2-4 weeks | Fixed-fee, scoped |
| Security Hardening | Conditional Access, MFA, DLP, sensitivity labels, Defender config | 4-6 weeks | scoped after discovery |
| Exchange Online Migration | Mailbox migration, hybrid coexistence, DNS cutover, validation | 8-12 weeks | Fixed-fee, scoped |
| SharePoint Migration | Content migration, information architecture, site governance | 8-16 weeks | Fixed-fee, scoped |
| Teams Governance & Rollout | Teams provisioning, lifecycle, guest access, calling, rooms | 6-10 weeks | Fixed-fee, scoped |
| Copilot Readiness & Deploy | Data classification, oversharing fixes, Copilot pilot, training | 6-8 weeks | Fixed-fee, scoped |
| Managed M365 Services | 24/7 monitoring, incident response, license management, optimization | Ongoing | Fixed-fee, scoped |
A poorly configured M365 tenant can cause significant security problems. Default settings may allow external sharing, leave DLP policies unenforced, and grant unregulated administrative access.
To address these risks, evaluate firms based on these key areas:
Microsoft Solutions Partner for Modern Work and Security. Consultants with MS-102, MS-700, SC-400, and SC-300 certifications.
HIPAA, SOC 2, FedRAMP, GDPR, and CMMC experience. Ask for audit documentation from past M365 compliance engagements.
Microsoft Defender suite configuration, Conditional Access design, Zero Trust architecture, and incident response capabilities.
Fixed-fee options with defined deliverables. Avoid open-ended engagements where "M365 consulting" becomes perpetual billable hours.
How many mailboxes, TB of SharePoint data, and users has the firm migrated? Look for 100,000+ mailbox migration experience.
User training, champion networks, and change management methodology. The best M365 configuration fails without user adoption.
24/7 support with defined response times, uptime guarantees, and escalation paths. Verify SLA terms in writing before signing.
Experience preparing M365 tenants for Copilot — data classification, oversharing remediation, and AI governance frameworks.
11,000+ engagement scale
Users migrated to Microsoft 365
28+
Years of Microsoft consulting
4
Bestselling Microsoft Press books
99.9%
Uptime SLA on managed M365
EPC Group is the only Microsoft 365 consultancy that offers a unique combination of expertise and services. We provide:
Our M365 methodology has been refined through hundreds of enterprise deployments. This ensures that every tenant is secure, governed, compliant, and optimized for maximum productivity.
EPC Group offers comprehensive M365 expertise for regulated industries. We specialize in:
Our team consists of certified M365 Administrators, Security Engineers, Information Protection specialists, and compliance experts. This ensures that every engagement meets technical excellence and regulatory standards.
Enterprise M365 deployment, security, governance, and managed services from EPC Group.
Read moreComprehensive guide to Microsoft cloud solutions for enterprise organizations.
Read moreComplete guide to preparing and deploying Copilot for Microsoft 365 in enterprise environments.
Read moreEPC Group leads enterprise Microsoft 365 consulting with Microsoft ecosystem expertise since 1997, 11,000+ enterprise engagements, and managed M365 services with 24/7 support and a 99.9% uptime SLA. Other top consultancies include Avanade (global Microsoft joint venture), Deloitte (regulated industry M365), Slalom Consulting (adoption and change management), Accenture (multi-platform enterprise), and Hitachi Solutions (Dynamics 365 + M365 integration). The best choice depends on your organization size, compliance requirements, and whether you need a dedicated Microsoft partner or broader IT strategy consulting.
Enterprise M365 consulting is scoped by need: a Microsoft 365 assessment and roadmap; tenant configuration and security hardening; full enterprise M365 deployment (Exchange Online, SharePoint, Teams, compliance) for 5,000-50,000 users; and managed M365 services sized by user count and SLA requirements. EPC Group delivers these as fixed-fee accelerators quoted after discovery.
Enterprise M365 consulting services include: tenant architecture and configuration, Exchange Online migration, SharePoint Online deployment and migration, Teams governance and rollout, Microsoft 365 security and compliance (DLP, sensitivity labels, retention policies), Copilot for Microsoft 365 deployment, Power Platform enablement (Power BI, Power Apps, Power Automate), identity and access management (Entra ID, Conditional Access, MFA), Microsoft Purview compliance configuration, and ongoing managed M365 services with 24/7 monitoring and support.
Deployment timelines vary by scope. A focused M365 security hardening engagement takes 4-6 weeks. Exchange Online migration for 5,000-10,000 mailboxes takes 8-12 weeks. Full enterprise M365 deployment (Exchange, SharePoint, Teams, compliance, training) for 10,000+ users takes 16-24 weeks. Copilot for Microsoft 365 readiness and deployment adds 6-8 weeks. EPC Group compresses timelines by 30-40% using pre-built frameworks and fixed-fee accelerators with defined milestones.
Look for Microsoft Solutions Partner designations for Modern Work and Security. Individual consultants should hold MS-102 (Microsoft 365 Administrator), MS-700 (Teams Administrator), SC-400 (Information Protection), SC-300 (Identity and Access), and SC-200 (Security Operations) certifications. For compliance-heavy environments, verify experience with HIPAA Business Associate Agreements, SOC 2 Type II audits, and NIST 800-171 controls. EPC Group maintains all these certifications plus specialized compliance credentials across regulated industries.
Yes, when properly configured. Microsoft 365 E5 (or E3 + compliance add-ons) supports HIPAA compliance with a signed Business Associate Agreement (BAA) from Microsoft. Required controls include: sensitivity labels on documents containing PHI, Data Loss Prevention (DLP) policies blocking external PHI sharing, Microsoft Purview retention policies for record-keeping, Conditional Access policies restricting access to managed devices, audit logging enabled for all mailbox and SharePoint activity, and encrypted email with OME. EPC Group specializes in HIPAA-compliant M365 deployments for healthcare organizations.
Microsoft 365 E3 ($36/user/month) includes Office apps, Exchange Online, SharePoint, Teams, basic security (Conditional Access, MFA), and core compliance features. Microsoft 365 E5 ($57/user/month) adds advanced security (Microsoft Defender for Endpoint P2, Defender for Identity, Cloud App Security), advanced compliance (eDiscovery Premium, Insider Risk Management, Communication Compliance), Power BI Pro, and audio conferencing. For regulated industries, E5 is typically required due to advanced compliance and security capabilities. EPC Group performs licensing audits to right-size M365 licensing, often saving enterprises 20-35% through optimized seat assignments.
For organizations with 5,000+ users, a hybrid model is optimal. Use a managed services partner like EPC Group for 24/7 monitoring, security incident response, compliance maintenance, platform updates, and escalation support. Maintain an internal team for day-to-day user support, service requests, and business-specific configuration. A managed services engagement at $10,000-$20,000/month is significantly less than hiring 3-4 additional senior M365 administrators at $130,000-$170,000/year each, while providing broader expertise coverage and documented response-time commitments per severity tier.
Schedule a free M365 assessment with EPC Group. We will:
Enterprise Microsoft 365 consulting includes several key areas. These are tenant architecture, Exchange migrations, SharePoint deployments, Teams governance, security and compliance, Copilot deployment, and ongoing managed support.
This guide compares what to look for in an M365 consulting partner. It also explains how EPC Group approaches enterprise M365 engagements for regulated industries.
Enterprise Microsoft 365 consulting is broader than a typical software deployment. It spans identity, security, compliance, productivity, and AI — and it requires deep knowledge of how these layers interact.
Core M365 consulting services include:
Not all Microsoft partners are the same. In 2022, the Microsoft Solutions Partner program replaced the old Gold/Silver model. When choosing a partner, consider the following designations:
| Designation | Relevant For |
|---|---|
| Modern Work | M365 deployments, Teams, SharePoint, Copilot |
| Security | Defender, Sentinel, Purview, Entra ID |
| Data & AI | Power BI, Fabric, Azure analytics |
| Infrastructure | Azure compute, networking, hybrid environments |
| Digital & App Innovation | Power Platform, custom app development |
| Business Applications | Dynamics 365, ERP, CRM |
EPC Group holds core designations. Fewer than 50 firms globally share that complete credential footprint.
Security and compliance configuration is where most M365 deployments fall short. Generic configurations leave gaps that regulators, auditors, and attackers exploit.
EPC Group's M365 security and compliance engagements cover:
HIPAA compliance in M365 requires specific controls across multiple workloads. Required configurations include:
The first step is to sign the Microsoft Business Associate Agreement (BAA) through the M365 admin center. This agreement is essential for using M365 with HIPAA-covered PHI.
Without the BAA, M365 cannot be used for HIPAA-covered PHI, no matter how well the technical controls are set up.
Deploying Copilot involves more than just assigning licenses. It retrieves content from SharePoint, Teams, OneDrive, and Exchange according to the user's current permissions.
If permissions are set incorrectly, Copilot may expose overshared content to unintended users.
EPC Group begins its Copilot deployment engagements with a permissions and data governance assessment. This process includes:
After these steps, we proceed with a phased rollout of Copilot.
We also build the change management program — training, adoption metrics, and governance framework — that determines whether Copilot succeeds long-term.
Microsoft 365 licensing is complex. E3 and E5 bundles differ significantly in security and compliance capabilities.
E5 at $57/user/month adds over E3:
Buying these as E3 add-ons costs around $35 per user each month, in addition to the base E3 price.
For regulated industries, the E5 plan is often the more affordable option.
EPC Group provides license optimization reviews in every M365 engagement. This ensures that clients maximize their investment in Microsoft services.
Post-deployment managed support covers the ongoing administration, security monitoring, and governance that keep an M365 environment healthy.
EPC Group's managed M365 services include:
M365 consulting engagements can differ significantly based on their scope. Here are some typical costs:
The timeline for migration varies based on the source environment and the number of users. For example, migrating from Google Workspace to M365 with 1,000 users usually takes:
However, larger organizations or those with complex compliance needs may need more time.
EPC Group employs a unique minimal-disruption migration tool. This tool allows for migrations to occur while maintaining continuous coexistence.
Copilot for Microsoft 365 requires an E3 or E5 base license. It also needs the Copilot add-on, which costs $30 per user each month. While you can use Copilot without an E5 license, its security and compliance features are essential for safe use in regulated environments. These features include:
In 2022, Microsoft Solutions Partner designations took the place of the old Gold/Silver partner program. There are six designations:
Earning a designation requires verified customer success references, certified staff, and revenue thresholds. EPC Group holds all six.
Teams governance starts with a naming convention, lifecycle policy, and external access policy. These elements must be in place before any user can create a team.
EPC Group sets up Teams policies through the M365 admin center and PowerShell. We also create a request and approval workflow for new teams. Additionally, we offer governance documentation for compliance auditors.
Yes, EPC Group provides advisory and hourly consulting for specific M365 issues. Our services include:
Contact us to discuss a targeted engagement. Most one-time advisory projects are finished in 1–5 days.
EPC Group has provided M365 deployments for Fortune 500 companies and regulated industries since 1997. Our services include:
All these services are delivered by a single team with core Microsoft Solutions Partner designations.
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