Professional Services

Why Microsoft Now for Law + Accounting + Consulting + A/E

In 2026, professional services firms will encounter distinct challenges. These firms include:

• Law firms (AmLaw, regional, and boutique)
• Accounting firms (Big 4, national, and mid-market)
• Management consulting firms
• Architecture and engineering firms

Billable-hour productivity has remained unchanged for a decade. At the same time, client price pressure has increased.

Generative AI presents a major opportunity for productivity gains. Published case studies show improvements of 25-40% that no firm can ignore.

Alongside the AI opportunity, these firms must navigate several challenges:

• Client-mandated cybersecurity requirements, including outside counsel and audit firm cybersecurity questionnaires, ISO 27001 expectations, SOC 2 attestation requests, and NIST CSF alignment.
• Complexities in ethical walls and conflicts management, such as lateral partner moves, deal team complexities, and joint engagements.
• Modernization of legacy time, billing, and matter management platforms, including Aderant Expert, Elite, BigHand, and custom Salesforce and ERP combinations that have reached end-of-cloud-fit.

Microsoft offers a comprehensive professional services stack. This includes:

• Dynamics 365 Project Operations
• M365 Copilot for billable-hour productivity
• SharePoint for matter and engagement workspace
• Microsoft Information Barriers for ethical walls
• Microsoft Defender XDR for confidentiality
• Microsoft Purview Information Protection for client confidential data

This stack is the most widely used enterprise platform among AmLaw, Big 4, and national accounting firms. It is also popular with Tier 1 management consulting and large A/E firms.

EPC Group's professional services practice has successfully completed projects across this entire range:

• AmLaw firms
• Big 4 accounting firms
• National accounting firms
• Tier 1 management consulting firms
• Large A/E firms

M365 Copilot — Billable Hour Productivity

M365 Copilot provides the highest recorded productivity boost among current enterprise AI deployments in professional services. Based on published case studies and EPC Group client experiences, users report a 25-40% increase in productivity for knowledge work tasks.

• Document creation and editing
• Data analysis and reporting
• Task automation and management

• Enhanced document creation
• Improved data analysis
• Streamlined communication

Document drafting. This process includes several key areas: motion drafting (law), audit work paper preparation (accounting), client deliverable drafting (consulting), and engineering report drafting (A/E).

By using Copilot for drafting, along with our firm’s template library and insights from previous similar matters, we can create first drafts 40-60% faster than traditional methods.

Document review. Contract review, agreement comparison, due diligence document review (deal teams), audit work paper review (managers + partners), client deliverable review.

Research synthesis. Legal research synthesis (with appropriate citation discipline), technical research synthesis, market research synthesis, competitive intelligence synthesis.

Email + meeting. Email triage + drafting, meeting preparation + summary, action item extraction + follow-up drafting.

Pitch + RFP. Pitch deck drafting from firm + practice + experience content, RFP response drafting, capability statement drafting, biographical material updating.

Knowledge management. Practice group knowledge synthesis, precedent + know-how curation, training material drafting, mentoring + onboarding content.

Information Barriers + Ethical Walls + Conflicts

Microsoft Information Barriers are essential for governance. They enable the deployment of Copilot at professional services firms that face significant conflicts, ethical walls, and confidentiality needs. EPC Group offers a design framework for Information Barriers in professional services that includes:

• Material conflicts
• Ethical walls
• Confidentiality requirements

Lateral partner moves. A lateral partner cannot access client content from their previous firm. They can, however, access content from their new firm. This access depends on their practice area and assigned matters.

Before opening new matters or expanding existing matter teams, conflicts checks are required.

Client conflict screens. Adverse-party representation isolation. Trade secret + competitive intelligence isolation between competing clients. Joint-defense + common-interest privilege boundary.

Deal team boundaries. An M&A advisor who represents the seller cannot access the buyer's analysis. Independence rules for audit firms apply to both audit and advisory services. Additionally, there is a separation between investment banking and research.

This separation varies based on the firm's structure.

Practice group + sector boundaries. Plaintiff vs defense practice (where firm has both). Litigation vs transactional practice (where conflicts exist).

Information Barriers apply to Teams chat + SharePoint sites + OneDrive sharing + Microsoft 365 Copilot content access. EPC Group's IB design is a primary deliverable in every professional services engagement.

Client Confidentiality + Sensitivity Labels

EPC Group's client confidentiality framework for professional services:

Sensitivity labels. Microsoft Purview Information Protection offers labels for client confidential content. These labels include encryption and access rights.

There are sub-labels for the highest-sensitivity content, including:

• M&A target identification pre-announcement
• Regulatory enforcement matter
• Privileged work product
• Confidential audit finding

DLP for Copilot. Prevents client-confidential content exposure across prompts + responses + agents. Critical for the firm's professional responsibility obligations.

Communication Compliance. Scans Copilot + Teams + Outlook for confidentiality breach indicators. Reviewer queues for compliance + risk + ethics counsel teams.

Do-not-forward + encryption. Client correspondence with encryption + restricted-redistribution rights. Client content shared externally only via authenticated + audited channels.

Customer Lockbox + Customer Key. Tenant-managed key control. Microsoft engineer access requires explicit firm approval.

D365 Project Operations — Time + Billing + Project Accounting Modernization

D365 Project Operations is the new cloud platform that replaces outdated systems for time tracking, billing, matter management, and project accounting in law firms, accounting, and consulting.

EPC Group has successfully completed D365 Project Operations migrations from:

• Aderant Expert (Elite)
• Aderant Elite (Elite 3E)
• BigHand
• SAP for professional services
• NetSuite
• Custom Salesforce and ERP combinations

Our clients include AmLaw 100 firms, Big 4 firms, and management consulting companies.

The migration pattern involves a phased rollout by practice group or office, allowing for parallel operation. The data migration from legacy systems includes:

• Clients
• Matters
• Engagements
• Time entries
• Expense entries
• Bills and receivables
• Project accounting
• Revenue recognition

Integration is also necessary with various systems, such as:

• Court systems (law)
• Audit and tax platforms (accounting)
• DMS (iManage and NetDocuments)
• Engagement letter platforms
• E-billing systems (LEDES and appropriate UTBMS coding)

SharePoint Matter + Engagement Workspace

SharePoint Online is the dominant matter + engagement workspace at AmLaw + Big 4 + Tier 1 consulting firms. Common deliverables include matter-status SharePoint dashboards + practice-group rollups + partner P&L dashboards (see SharePoint dashboard examples + design patterns for representative layouts). EPC Group's matter workspace architecture:

Per-matter / per-engagement site. Hub-and-spoke topology with practice-group hub sites. Per-matter site contains team membership, documents, communications, deadlines, billing references, deliverables.

DMS integration. iManage Work is commonly used at law firms. NetDocuments can also integrate with SharePoint. This creates a system for activity, communication, and documents not managed by DMS.

This hybrid model allows:

• High-value documents to reside in DMS
• Lower-friction collaboration content to be stored in SharePoint

Copilot grounding. Copilot grounded on matter content for research + drafting within the matter context. Critical: information barriers + sensitivity labels prevent cross-matter content bleed.

Lifecycle. Matter opening (conflicts check, engagement letter, file opening), active matter (collaboration + document creation + tracking), matter closure (file closing, retention application, restricted access).

Cybersecurity for Professional Services

EPC Group's professional services cybersecurity reference architecture addresses client-mandated requirements + the firm's own professional responsibility:

Client-facing posture. SOC 2 Type II + ISO 27001 + NIST CSF alignment with documented control evidence. Documented response to outside counsel + audit firm cybersecurity questionnaires.

Identity. Entra ID + Conditional Access + MFA enforcement + PIM. Phishing-resistant authentication for partners + senior associates + IT admins (FIDO2).

Endpoint. Intune + Defender for Endpoint XDR for all firm devices. Strong remote-wipe + retention policies for departing partners + associates.

Email. Defender for Office 365 P2 with anti-phishing + BEC protection. Critical: wire-fraud + escrow-redirection BEC attacks specifically targeting law firms + accounting.

Data. Purview Information Protection + DLP across email + Teams + SharePoint + OneDrive + Copilot. Insider Risk Management policies tuned for client-content exfiltration patterns.

SOC. Sentinel SIEM + SOAR. Professional-services-tuned analytics rules including credential compromise patterns + client content exfiltration + wire fraud + privileged matter access anomalies.

Engagement Operating Model — Professional Services Application

The 7-phase Engagement Operating Model (at /engagement-model) applied to professional services:

Discover. We analyze various systems and frameworks to ensure compliance and efficiency. Our focus includes:

• Time and billing system landscape
• DMS landscape
• Conflicts and ethical-walls architecture
• Current Microsoft tenant
• SOC 2 and ISO 27001 compliance
• Client-mandated cybersecurity posture
• Professional responsibility framework (ABA Model Rules, AICPA Code, ICAEW, and RICS where applicable)

Architect. D365 Project Operations reference architecture, SharePoint matter + engagement workspace architecture, Information Barrier design, Copilot governance design with confidentiality overlay, Defender + Sentinel SOC architecture with client-facing posture.

Plan + Build + Validate + Deploy + Run per standard EOM with professional services-specific milestones (fiscal year + quarter cadence, partner compensation cycle, peer review / inspection cycle for accounting firms).

Engagement Investment

EPC Group professional services engagement tiers:

Foundation ($150K-$300K, 12-16 weeks): Copilot governance + IB design OR SharePoint matter workspace pilot OR D365 Project Operations pilot OR Defender + Sentinel implementation.

Enterprise ($350K-$850K, 20-36 weeks): Multi-workload + EOM full lifecycle + Managed Microsoft Support. Suitable for AmLaw 100-200, national accounting firm, Tier 1 consulting practice.

Platform ($850K-$2.5M, 36-60 weeks): This solution includes Enterprise and D365 Project Operations, a full Center of Excellence, and support for multi-office and multi-jurisdictional needs.

It is ideal for:

• AmLaw 50 firms
• Magic Circle firms
• Big 4 firms
• Large global consulting firms

Ongoing operations via /managed-microsoft-support-tiers — Extended Coverage or 24x7x365 tier appropriate for billable operations + client-facing posture.