SharePoint handles day-to-day file sharing well, but it is not built for the access controls, audit depth, and external-party controls that confidential legal matters demand. For routine internal collaboration, Microsoft 365 is usually enough. For M&A due diligence, conveyancing chains, litigation bundles, or any matter where documents leave the firm’s four walls, a purpose-built virtual data room closes gaps that SharePoint leaves open by design.
That distinction matters more for UK law firms than for most other businesses. In particular, SRA obligations, legal professional privilege, UK GDPR, and the expectation of a defensible audit trail all raise the stakes of getting document sharing wrong.
This guide compares SharePoint and virtual data room software side by side, walking through where each tool fits in a legal workflow.
SharePoint vs Virtual Data Room: Quick Comparison Table
Before the deeper analysis, here is how SharePoint and virtual data room software compare across the criteria that matter most in a legal transaction.
| Criterion | Virtual Data Room | SharePoint |
|---|---|---|
| Security and encryption | Enterprise-grade encryption and access controls | Solid, but configuration-dependent |
| Granular permissions | Document-level for external review | Site, library, folder, and item-level permissions that require careful configuration |
| Audit trails | Detailed, court-defensible | Available, less granular by default |
| External collaboration | Designed for it | Possible, but riskier to set up |
| Ease of setup | Fast, deal-ready | Requires IT configuration |
| Compliance (UK GDPR, ISO 27001, SOC 2) | Provider certifications and controls vary; UK GDPR compliance depends on both provider controls and customer configuration | Depends on M365 tenancy & setup |
| Cost | Per-deal / subscription | Often included in the M365 licence |
We can trace this pattern throughout: SharePoint covers internal collaboration solidly, while a dedicated data room solution is engineered specifically for external, high-stakes sharing.
- Firms weighing their next move can compare virtual data room providers to narrow that choice ahead of their next high-stakes deal.
Let’s explore what each platform actually is.
What Is SharePoint, and How Do Law Firms Use It?
Microsoft SharePoint is a document management and collaboration platform included in Microsoft 365. Law firms use it as a central repository for internal documents, including policies, precedents, templates, and case files. They also use SharePoint team sites to organise work by matter, department, or practice group.
For many firms, SharePoint is already an integral part of their daily work. That makes adoption easier because staff are familiar with Microsoft tools and need little extra training. It also integrates seamlessly with Word, Outlook, and Teams. So fee earners can manage drafts, comments, and internal collaboration inside the software they already use.
| SharePoint use case | How law firms use it |
| Internal document storage | Store policies, precedents, templates, and working files |
| Matter collaboration | Create team sites for specific cases, clients, or departments |
| Draft management | Work on documents in Word and keep versions in one place |
| Firm-wide updates | Publish internal guidance, procedures, and announcements |
| Microsoft 365 integration | Connect document work with Outlook, Teams, and Office apps |
This familiarity is a real advantage. Fee earners can save working drafts in SharePoint, practice managers can publish firm-wide policies, and IT teams can manage access through tools already covered by the firm’s Microsoft 365 licences.
However, SharePoint becomes more complex when files need to be shared outside the firm. It was designed mainly for collaboration inside one organisation, not for buyers, opposing counsel, external advisers, or third parties reviewing sensitive legal documents under time pressure.
External sharing is possible, but it depends on careful setup. Firms need to manage guest access, sharing links, permissions, and, in some cases, additional Microsoft 365 licensing tiers for advanced controls.
This is where a dedicated platform built for external, high-stakes legal work and secure file sharing becomes relevant, as explained in the next section.
What Is a Virtual Data Room?
A virtual data room is a secure online platform purpose-built for sharing confidential documents with parties outside the organisation during high-stakes transactions.
Law firms use a data room solution for M&A due diligence, property transactions, litigation bundles, and any matter in which sensitive files must be shared with external counterparties under controlled, logged conditions.
Unlike general-purpose cloud storage, data room software is designed around the transaction itself, so document-level permissions, dynamic watermarking, granular download controls, and detailed audit trails are standard rather than configuration projects layered on afterward.
Bain & Company projected in December 2024 that global M&A deal value would reach roughly $3.5 trillion by the end of 2024, and most transactions generate confidential documents that must be shared between buyers, sellers, and advisers.
That scale of activity is why due diligence and dataroom terminology are now used almost interchangeably in M&A practice: the platform functions as the deal’s central nervous system.
SharePoint vs VDR: Where the Differences Matter for Law Firms
Six areas separate a data room solution from SharePoint in ways that matter specifically to legal practice. Each is examined below, moving from security through to cost, so you can weigh them against your own needs.
Security and Confidentiality
A virtual data room encrypts documents when stored and sent, adds dynamic watermarking that can display user-specific information, and records audit logs of access details such as user activity and timing. That combination discourages leaks and helps trace them when they occur, which is directly relevant to legal professional privilege. This means that once privileged material is disclosed to the wrong party, privilege may be challenged or require remedial steps.
SharePoint’s underlying encryption is solid since it inherits Microsoft’s platform-level security. Watermarking of this kind, however, is not native to SharePoint. It requires Microsoft Purview sensitivity labels, which in turn require Microsoft 365 E5 licensing or the E5 Compliance add-on, so firms on standard Business or E3 plans do not have it without extra spend.
Granular Permissions and Access Control
Permissions in a data room operate at the document level, allowing view-only, no-download, time-limited, or restricted access to a named individual. Restricting third parties to exactly what they need to see, and nothing more, is the default rather than an afterthought.
SharePoint permissions, by contrast, run through site groups, libraries, folders, and individual items, layered on top of each other.
For one internal team, that structure of file-sharing platforms is manageable. For a multi-bidder auction process with several buyer groups needing different slices of the same document set, the permission matrix becomes difficult to maintain, and a single misconfigured setting can expose the wrong file to the wrong bidder.
Audit Trails and Regulatory Defensibility
A well-configured virtual data room can log views, downloads, and permitted print activity, creating an exportable audit record that may support disputes or compliance reviews. That level of detail supports SRA compliance reviews, creating firm evidence for reference if a dispute later turns on who saw a document and when in the transaction.
It also matters for statutory deadlines: under UK GDPR, firms must notify the ICO without undue delay and within 72 hours of becoming aware of a notifiable personal data breach. A precise activity log is often the fastest way to establish what happened.
SharePoint also includes audit logging, but the depth varies by license. Audit (Standard) is available across Microsoft 365 Business and Enterprise plans, with retention defaulting to 180 days on Business and E3 tiers. The forensic-grade detail and extended one-year retention that deal teams typically expect, including advanced event types, are available with Audit (Premium), which requires Microsoft 365 E5 or the E5 Compliance add-on.
External Collaboration and Third-Party Access
Data rooms are built on the assumption that most users sit outside the host organisation. Opposing counsel, prospective buyers, and third-party advisers can be invited without needing a Microsoft account or navigating a firm’s internal identity systems.
SharePoint’s external access typically depends on Microsoft Entra B2B guest access or another tenant-configured sharing method. If a counterparty’s own IT policies restrict incoming guest access, which is common at large financial institutions and some corporates, that route can be blocked entirely, stalling a deal at exactly the wrong moment.
Compliance: UK GDPR, Data Residency, and Certifications
For firms bound by SRA and UK GDPR requirements, hosting location and independent certification carry real weight. Purpose-built data room providers commonly hold ISO 27001, SOC 2 Type II, and GDPR-aligned controls, data processing terms, and relevant security certifications at the application layer, plus UK-specific hosting options that support data residency requirements.
SharePoint is integrated into Microsoft’s compliance framework, which includes ISO 27001 and GDPR coverage at the platform level. The distinction is that responsibility for correctly configuring the tenancy, setting retention policies, and managing residency settings falls to the firm’s IT team. In contrast, a VDR provider supplies many baseline controls, but the firm remains responsible for access setup, retention choices, data processing terms, and matter-specific governance.
Cost and Licensing
If a firm already pays for Microsoft 365, SharePoint’s marginal cost for basic file storage and internal sharing is close to zero, which is a genuine advantage for everyday work. Data room services, by contrast, are typically priced per deal or on a subscription basis, layered on top of existing software spend.
That cost difference narrows considerably once a matter needs deal-grade controls. Reaching SharePoint parity on watermarking, extended audit retention, and information rights management means adding Microsoft 365 E5 licensing, Purview configuration, and often third-party tools, which can be costly to underestimate until the project is already underway.
Legal Use Cases: Which Tool Fits Each Job?
The right platform depends on the job, not a blanket rule. Four scenarios common to UK legal practice illustrate where each tool earns its place.
M&A and Due Diligence
Mergers and acquisitions work generates the clearest case for a dedicated data room. Multiple bidder groups, financial advisers, and legal teams from both sides need controlled access to the same evolving set of documents, often on a tight timeline. A structured due diligence index, document-level permissions, and a built-in Q&A workflow keep that process auditable and on schedule.
Property and Conveyancing Transactions
Conveyancing involves fewer external parties than a typical M&A deal, but the documents, mortgage details, identity records, and title deeds are just as sensitive. A data room for law firms handling high volumes of property transactions benefits from watermarking and time-limited access, particularly when multiple parties in a chain need to view the same file at overlapping stages.
Litigation Bundles and eDisclosure
Litigation bundles often include privileged material that must be transmitted to opposing counsel, expert witnesses, and the court without weakening the disclosure record or access history. Audit trails that log every view and download give a firm a defensible record if disclosure obligations are later challenged.
Confidential Client Matters
Not every confidential matter needs a full data room infrastructure. A single sensitive client file shared with one trusted external adviser can be securely stored within a well-configured SharePoint guest access setup, provided the firm has already properly worked through its permission and retention settings.
When SharePoint Is Enough vs When You Need a VDR
Not every matter justifies a dedicated platform, and treating every file as if it needs data-room-grade controls wastes time and budget.
The two lists below draw the practical line.
SharePoint may be sufficient when:
- Collaboration is internal only, with no external parties in the file
- Documents are low-sensitivity, non-privileged working drafts
- No external counterparties need controlled, time-limited access
- The firm’s Microsoft 365 tenancy is already configured and actively maintained
A VDR is warranted when:
- Confidential files must reach external parties outside the firm’s control
- The matter involves M&A, due diligence, or litigation with multiple external reviewers
- Court-defensible audit trails and document-level permissions are a requirement, not a nice-to-have
- SRA and UK GDPR compliance sit at the centre of the transaction’s risk profile
How to Choose: A Decision Checklist for UK Firms
Six factors decide most of these calls in practice. Work through them for any matter where the platform choice is not already obvious.
- Sensitivity of the data. Privileged, financial, or personal information immediately raises the bar.
- Number of external users. More external parties mean more exposure if permissions are not granular.
- Compliance requirements. Confirm which certifications (ISO 27001, SOC 2, UK GDPR) the matter or counterparty demands.
- Budget. Weigh per-deal VDR pricing against the licensing tier SharePoint would need to use to close the same gaps.
- Setup time. A data room can be deal-ready within a day; SharePoint’s external-sharing configuration often takes longer.
- Available IT resource. Purview configuration and guest access management require dedicated IT attention that smaller firms may not have on hand.
FAQ
Can I use SharePoint as a data room?
Yes, with significant configuration. SharePoint can store and share files securely, but it lacks native dynamic watermarking, structured due diligence Q&A, and forensic-grade audit retention without upgrading to Microsoft 365 E5. For basic internal sharing, this is manageable; for M&A or other high-stakes transactions involving external parties, most firms find that a purpose-built virtual data room delivers the required controls with far less setup.
Is SharePoint secure enough for legal documents?
SharePoint’s underlying security, encryption, and access controls, along with Microsoft’s own certifications, are solid for internal use. The gap for legal documents appears once files leave the firm: SharePoint’s guest access, permission layering, and premium audit features need careful configuration to match what a dedicated data room provides by default for privileged, client-sensitive material.
What’s the difference between SharePoint and a virtual data room?
SharePoint is a general-purpose collaboration and document management platform designed for internal teams. A virtual data room is purpose-built for secure, external, high-stakes document sharing, with document-level permissions, dynamic watermarking, and detailed audit trails included as standard rather than added through extra configuration or licensing.
Do UK law firms need a VDR for due diligence?
Often, yes, especially for multi-party, high-value, or sensitive due diligence. Due diligence typically involves multiple external parties reviewing an evolving, sensitive set of documents under time pressure. A virtual data room’s structured indexing, granular permissions, and Q&A workflow are built for exactly that scenario, and the audit trail it produces supports SRA compliance reviews if the matter is later scrutinised.
How much does a virtual data room cost compared to SharePoint?
SharePoint’s marginal cost is low if a firm already holds Microsoft 365 licensing, but matching VDR-grade controls, watermarking, extended audit retention, and information rights management usually requires Microsoft 365 E5 plus configuration time. Virtual data rooms are typically priced per deal or on a subscription basis, which is often comparable once upgrade costs are factored in.
Conclusion and Recommendation
SharePoint and a virtual data room address different needs, and the most effective setup for most UK law firms combines both. SharePoint remains the ideal solution for internal collaboration, policy libraries, and day-to-day document management, particularly where the firm already has Microsoft 365 licenses to run it effectively.
A virtual data room takes over the moment a matter involves external parties, sensitive material, and a genuine need for SRA-defensible audit trails, such as M&A due diligence, conveyancing chains, and litigation bundles.
The SharePoint vs VDR decision ultimately comes down to matching the platform to the matter’s risk profile rather than defaulting to whichever tool the firm already has open.