eDiscovery and Litigation Hold for Canadian Law Firms: Purview-Backed, Defensibility-First
Microsoft Purview eDiscovery (Standard and Premium), litigation hold configuration, defensible deletion at matter close, and production-set export to Relativity, DISCO, or your outside-counsel review platform — managed by Fusion Computing’s CISSP-led team for Canadian law firms.
eDiscovery is the place where IT infrastructure meets evidence law. When opposing counsel asks for production or a regulator asks for records, the firm’s answer needs to be a documented process with a chain of custody — not a manual file search across SharePoint, OneDrive, mailboxes, and a legacy file server.
Why eDiscovery and litigation hold matter for Canadian law firms
Two scenarios drive the bulk of Canadian law-firm eDiscovery work. First, the firm is producing for its client in active litigation, and opposing counsel has issued a request for documents that requires a defensible search across the firm’s collected data. Second, the firm is responding to a regulator (the LSO during a practice inspection, a securities commission during an examination of a client) and needs to produce records on a documented retention horizon.
Both scenarios require the same underlying infrastructure: a documented retention policy applied through Microsoft Purview labels, a litigation hold mechanism that suspends retention deletion on identified custodians, a search interface that can find responsive records across all of the firm’s data sources, and an export workflow that produces a load file the outside-counsel review platform accepts. The same infrastructure also defends against the partner-departure scenario where a leaving lawyer downloads matter files; the audit log of who-accessed-what-when becomes admissible evidence.
What Fusion handles for eDiscovery and litigation hold
How eDiscovery work is priced
Two cost components. Microsoft licensing for Purview eDiscovery (Standard included in Microsoft 365 E3, Premium requires E5 or eDiscovery add-on) flows through at Microsoft’s per-user-per-month rate without Fusion markup. Fusion engagement layer covering hold deployment, custodian configuration, search/export workflow, and chain-of-custody documentation is included in the per-lawyer managed-IT pricing for Fusion-managed firms.
For specific production-volume engagements (large litigations, multi-firm productions, regulator investigations) we scope on a time-and-materials basis with a documented runbook produced before the engagement starts. The Purview Legal Hold and eDiscovery Cost walkthrough for a 12-lawyer Ontario firm shows what a typical mid-market engagement runs.
Related resources
- Hub: IT and Cybersecurity for Canadian Law Firms
- Deep dive: Microsoft Purview Legal Hold and eDiscovery Cost: 12-Lawyer Ontario Firm Walkthrough
- Cybersecurity for Canadian Law Firms (sibling)
- Microsoft 365 Copilot for Law Firms (sibling)
- Microsoft 365 Copilot Oversharing
- Managed Cybersecurity Services
- Toronto Law Firm IT (city spoke)
Talk to a CISSP-led eDiscovery team
Thirty-minute walk-through of your firm’s current Purview / eDiscovery posture and what defensible production looks like across your data sources.
Frequently asked questions
Do we need Purview Premium or is Standard enough?
Purview eDiscovery Standard (included in M365 E3) handles basic case management, hold deployment, search, and export. Purview Premium adds custodian management at scale, analytics, predictive coding, and review capability. The decision depends on the firm’s production volume. Mid-market commercial firms typically need Premium. Solo and small-firm general-practice firms often run on Standard.
Can you produce to Relativity or DISCO for the firm’s outside counsel?
Yes. Production-set export from Purview eDiscovery into Relativity, RelativityOne, DISCO, Reveal, and most outside-counsel review platforms is a standard configuration. We produce the load file in the format the review platform expects with documented chain of custody.
How do you handle data outside Microsoft 365 (legacy file servers, practice-management databases)?
For data outside the M365 boundary, we either integrate the source into the Purview discovery surface (where supported) or run a parallel collection process with documented chain of custody. iManage Work, NetDocuments, PCLaw, and Clio Manage all have integration patterns we’ve deployed.
What happens to data when a matter closes?
The firm’s records-retention policy applies via Purview retention labels, with defensible deletion at the documented horizon (typically tied to the firm’s LSO retention obligations and the matter’s limitation period). Closing a matter does not automatically delete records; the retention label and the firm’s policy do, on schedule, with audit-log evidence that the deletion was policy-driven.
How does this differ from outsourcing the whole eDiscovery function to a legal-tech vendor?
Legal-tech eDiscovery vendors (kCura, DISCO as a service) typically handle the review and production layers for active litigations. Fusion handles the infrastructure underneath: the Microsoft 365 tenant configuration, the Purview labels, the litigation-hold mechanism, the audit log. The two are complementary; we work alongside legal-tech vendors for firms with sustained production volume.
