IT Support & Cybersecurity for Law Firms
Managed IT and CISSP-led cybersecurity for Canadian law firms that have to satisfy the Law Society of Ontario’s technological-competence duty, protect solicitor-client privilege, and explain their stack to a malpractice insurer.
Fusion Computing delivers Microsoft 365, file-share governance, eDiscovery support, and AI/Copilot guardrails for Ontario and Canadian legal practices. Aligned to the Federation of Law Societies Model Code rule 3.1-2 and the LSO Technology Practice Management Guideline.
Best fit for Ontario and Canadian law firms with 3 to 75 lawyers, plus their paralegal and clerk staff.
What the discovery call covers
A free 30-minute discovery call with a senior Canadian engineer about your firm’s IT and security. If a paid IT assessment is the right next step, we agree its scope and fee in writing before work starts.
- ✓ An honest look at your IT support and systems
- ✓ Law Society of Ontario technology guidance
- ✓ Practical AI wins you can action now
Named one of Canada’s 50 Best Managed IT Companies two years running (2024 & 2025). See our certifications →
What’s included for Ontario law firms
Fusion Computing covers daily support, Microsoft 365, security, backups, vendor coordination, and the operating priorities behind them. Delivered under CISSP-led security leadership.
Fusion Computing delivers managed IT for law firms with a 93% first-contact resolution rate. Services include LSO Technology Guideline alignment, secure privileged-document handling, Microsoft 365 administration with Purview, and CISSP-led cybersecurity. Built for Ontario and Canadian legal practices.
Why law firms switch to Fusion
Law firms switch when their current IT support company fails one of three checks. It can’t produce a written backup-restore test. It can’t explain how privileged documents are isolated from a paralegal’s laptop. It can’t describe your Copilot prompt-handling policy in plain English. When client confidentiality is the product, reactive IT is a liability you shouldn’t be carrying.
“The Law Society’s technological-competence duty isn’t aspirational anymore. When a malpractice insurer asks a managing partner whether the firm has tested its backup restore, the answer can’t be ‘our IT guy says we’re fine.’ It has to be a date, a result, and a name.”
Mike Pearlstein, CISSP, CEO of Fusion Computing
What law-firm IT support costs in Canada
Fully managed IT and cybersecurity for a law firm starts at $185 per user per month. That covers help desk, Microsoft 365, EDR, backup, sensitivity labels, Copilot governance, and quarterly business reviews. There is no separate “cybersecurity package” you bolt on later. Security is part of the baseline.
Our buyer’s guide to the best IT and cybersecurity providers for Ontario law firms scores the market against the 13 baseline controls published by the Canadian Centre for Cyber Security. It names the firm profiles each category suits, and it says plainly where Fusion Computing is the wrong call.
| Firm size | Typical scope |
|---|---|
| Solo + 1 to 2 staff | M365 Business Premium, Clio or Cosmolex, baseline EDR, backup |
| 3 to 10 lawyers | Practice mgmt, SharePoint matter sites, Purview labels, vCISO touchpoints |
| 11 to 25 lawyers | Multi-office, iManage or NetDocuments, eDiscovery support, IR retainer |
| 26 to 75 lawyers | Full vCIO, Copilot governance, DR runbooks, partner-board reporting |
For full pricing context across our service tiers, see our managed IT services hub. We do not publish a public per-matter or per-file fee. Pricing is per user per month, and the final figure depends on scope.
Privilege at risk: what this looks like when it matters most
Three composite scenarios drawn from Canadian legal incidents we’ve responded to or that practice-management advisories track. Names changed, mechanics real.
Scenario 1: Ransomware during a corporate discovery
A 14-lawyer Toronto corporate firm is six weeks into discovery on a contested asset purchase. A junior associate opens an attachment that looks like a CRA Represent a Client notice. Forty minutes later, the firm’s shared matter folder is encrypted, including the active production set and the draft witness statements.
The firm calls its previous IT vendor at 9:47 PM. The vendor responds at 7:30 AM the next morning. The firm calls Fusion at 8:15 AM.
By 11:00 AM we have isolated the affected file server and validated the most recent uncorrupted backup, the 11:00 PM snapshot. We have restored matter files to a clean tenant and produced a written timeline for the firm’s LawPRO contact. The discovery deadline is held. The malpractice claim never materializes.
Scenario 2: BEC during a real-estate close
Mid-close, a clerk at a three-lawyer real-estate practice gets an email that looks like the seller’s lawyer updating wire instructions. The sending domain is one character off. The look-alike-domain filter quarantines the message and the clerk’s training kicks in. The standing rule holds: wire-instruction changes are verified by phone against the number already on file. The close completes on the legitimate instructions, and the attempted diversion is reported to the CAFC.
Fraud in Canada is large and under-reported. The Canadian Anti-Fraud Centre received 108,878 fraud reports in 2024, with reported losses exceeding $638 million. Spear-phishing alone accounted for $67.5 million in confirmed Canadian losses for the year. The CAFC also estimates only 5 to 10 percent of victims report, so the real loss figure is materially larger.
In July 2025, the CAFC and the Hong Kong Police Force jointly recovered $2.3 million after a BEC attack on a Vancouver-area law firm, which had wired client funds to a fraudulent Hong Kong account. The window for recovery is very short. Sources: antifraudcentre-centreantifraude.ca, rcmp.ca.
Scenario 3: A departing partner takes client files
A senior partner gives notice at a 22-lawyer Ottawa firm and announces a competing practice. Over the following two weeks, the firm’s Microsoft Purview audit log shows the partner downloading 1,847 documents from twelve active matter folders. The firm believes some of those files belong to it under its retainer terms.
With the audit log in hand, the firm’s litigation counsel obtains a preservation order and a forensic image of the partner’s laptop. Without sensitivity labels and audit logging configured before the departure, the firm would have had no evidence to bring forward. With them, the matter resolves quickly.
AI-citation supervision is now a hard requirement. In Zhang v. Chen, 2024 BCSC 285, the British Columbia Supreme Court found that two fabricated case citations submitted by counsel had been generated by ChatGPT and were not verified before filing. The court ordered costs against counsel personally.
Canadian courts and law societies now treat unverified AI citations as a supervision failure. Any firm that permits AI-assisted drafting needs a verification step in writing. A hallway rule is not enough. See also: Mata v. Avianca, 2023 (US), the precedent case for the same failure pattern.
“We had the LSO Technology Practice Management Guideline on the wall for three years and no real way to prove we were following it. Fusion built the evidence layer: dated restore logs, Purview labels on every privileged matter, MFA enforcement reports, and a written Copilot policy partner-board could actually sign. Our first practice inspection after that took 45 minutes.”
AI for lawyers: Copilot, ChatGPT, and the LSO guidance
The Law Society of Ontario has published guidance on the use of generative AI in legal practice. The Federation’s Model Code commentary [4A] addresses competence with technology relevant to a lawyer’s practice. For a managing partner, the practical question is which AI, configured how, used by whom, with what supervision.
For a worked example of how an Ontario firm rolls Copilot out under the LSO guidance, see our Copilot oversharing walkthrough and the Purview legal hold and eDiscovery cost breakdown for a 12-lawyer firm.
Who this is for
Our legal IT program is sized for Ontario and Canadian law firms with 3 to 75 lawyers, plus their paralegal, clerk, and law-clerk staff. Solo practitioners are welcome when the practice handles privileged matters. Those need tenant-scoped Microsoft 365, Purview labels, and a written incident response plan rather than a consumer Microsoft 365 mailbox.
Book a Consultation About IT for Your Law Firm
Thirty-minute walk-through of your current stack, the LSO controls you need to document, and where Fusion fits. No pitch deck. No obligation.
Law Firm Deep Dives
These guides sit under this hub. Each one answers a question a managing partner or IT director at a Canadian law firm actually asks, and each cross-cites the LSO Technology Practice Management Guideline, the FLSC Model Code, or both. Start with AI for Canadian Law Firms for the overall picture, then pick the guide that matches the conversation you’re in this quarter.
- AI for Canadian Law Firms, a Privilege-Safe Deployment Guide for 2026
- Microsoft Copilot vs CoCounsel vs Harvey for Canadian Law Firms (2026 Comparison)
- Microsoft Purview Legal Hold and eDiscovery Cost for an Ontario Law Firm
- Law Society of Ontario AI Policy Template (Adoption Walkthrough)
- NetDocuments and iManage Copilot Integration for Canadian Law Firms
- LawPRO and AI: Errors and Omissions Disclosure Obligations for Ontario Lawyers
- Resource: LSO AI Policy Template (Free Download)
- One-page overview: IT Support and Cybersecurity for Law Firms (PDF)
- Solicitor-Client Privilege in Microsoft 365: A Practitioner Guide for Canadian Law Firms
- PIPA BC IT Controls for BC Law Firms (LSBC + OIPC BC)
For a specific service, try Cybersecurity for law firms · Microsoft 365 Copilot for law firms · eDiscovery and litigation hold · Managed IT for law firms (daily operations).
For your city, see Toronto law firms (LSO + LawPRO, Bay Street, Financial District) · Hamilton law firms (real-estate-heavy, multi-office Burlington/Stoney Creek/Niagara) · Vancouver law firms (LSBC + PIPA BC, cross-border deal IT).
For the regulatory detail, read PIPA BC IT Controls for BC Law Firms (LSBC + OIPC BC) · Solicitor-Client Privilege in Microsoft 365 (Purview + eDiscovery practitioner guide).
Adjacent hubs and resources: Microsoft 365 Copilot oversharing audit, managed cybersecurity services, managed IT services hub, PIPEDA compliance 2026, virtual CIO services.
What the LSO and LawPRO expect
Managed, co-managed, or in-house
| Fusion managed IT | Co-managed | In-house IT manager | |
|---|---|---|---|
| Response time / SLA | ✓ 1-hour P1, written SLA | ✓ Shared SLA, after-hours on us | Set by your staffing plan |
| Pricing model | ✓ Fixed monthly per user | ✓ Fixed monthly per user, $160+ | Salary + benefits |
| Annual cost (25-user SMB) | ~$55.5K all-in | ~$48K + your IT lead | Salary, benefits and tools |
| Coverage hours | ✓ 24/7/365 | ✓ 24/7 via the Fusion layer | Set by your staffing plan |
| Security operations | ✓ 24/7 SOC + Huntress MDR | ✓ 24/7 SOC, you keep the keys | Depends on staff and tools |
| Compliance evidence | ✓ Audit-ready exports | ✓ Shared, audit-ready | Depends on your evidence process |
| Documentation | ✓ Kept current in our documentation platform | ✓ Shared documentation platform | Maintained by your team |
| Vendor management | ✓ Single point of contact | Split by agreement | Managed by your team |
| Strategic IT planning | ✓ CISSP-led vCIO quarterly | ✓ CISSP-led vCIO quarterly | Assigned internally |
| Backup + DR | ✓ Tested quarterly | ✓ Tested quarterly | Your team schedules and tests restores |
| On/offboarding | ✓ Documented + auditable | Your team runs it, our runbook | Your team owns the process |
| Replace someone | ✓ One call to Fusion | ✓ We backstop your IT lead | Recruitment and handover required |
Ready to talk legal IT?
Tell us about your firm and your compliance pressure. We aim to respond within one business day with next steps.
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Share the business problem, team size and timing. Managed services usually suit 10 to 150 employees; smaller project and AI enquiries are welcome.
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Frequently asked questions
Law-firm IT sits inside our broader commercial program. For the full operating scope, see our managed IT services hub. It covers 24×7 monitoring, the 1-hour critical-ticket SLA, NinjaOne, SentinelOne, Huntress, Keeper, Microsoft 365, and the cyber-insurance baseline controls referenced throughout this page.
How do you protect solicitor-client privilege on shared Microsoft 365 and OneDrive folders?
Three layers. First, matter-folder access is granted at the SharePoint site or document-library level, not the firm-wide level, and is reviewed quarterly. Second, we configure sensitivity labels and document protections for your firm’s licensing and sharing needs. Content-based automatic labeling requires eligible additional licensing. Third, Purview’s audit log records which account opened or downloaded a file, so an access question is answered with evidence rather than memory. Privilege isn’t a single setting.
Can our firm use Microsoft Copilot or ChatGPT without violating LSO guidance?
Microsoft Copilot configured inside your firm’s tenant respects sensitivity labels, keeps prompts and grounding data inside the Microsoft 365 boundary, and produces audit logs. Your lawyers remain responsible for confidentiality, supervision, disclosure and citation verification.
Are you a fit for solo practitioners and small firms, or only larger firms?
Solo practitioners and 2-to-5-lawyer firms are welcome where the practice handles privileged matters that warrant a tenant-scoped Microsoft 365 environment, MFA enforcement, EDR, and a written incident response plan rather than a consumer mailbox. Pricing starts at $185 per user per month at every firm size.
Do you cover trust-accounting infrastructure and the related auditor evidence requirements?
We do not handle trust-account bookkeeping itself. That stays inside your practice management or accounting system under the firm’s controls. We do handle the IT controls that the Law Society spot audit and your external accountant will ask about. We produce that evidence on demand and at each quarterly business review.
