What Law Firms Need to Know Before Using Microsoft 365 Copilot
Author: Christine Champion | CPD Accredited AI Trainer. Last updated August 2026.
Contents
Using Microsoft 365 Copilot Safely in Law Firms: Key Facts at a Glance
Using Microsoft 365 Copilot safely is not simply about enabling AI. Successful adoption requires clear governance, appropriate training, robust information management and an understanding of where human judgement remains essential.
Law firms remain responsible for confidentiality, supervision and client service standards when using AI tools.
Microsoft 365 Copilot works within your existing Microsoft 365 permissions and security controls, making information governance and access management critical.
Copilot can help draft, summarise and organise information, but it cannot provide legal advice or replace professional judgement.
AI-generated content should always be reviewed for accuracy, context and suitability before being used in client work.
Solicitors remain accountable for the quality and accuracy of legal services, regardless of whether AI was used during the process.
Staff need clear guidance on when AI can be used, when additional review is required, and when human expertise should take priority.
Effective AI compliance for law firms involves collaboration between leadership, compliance, risk and IT teams.
Regular training helps employees understand both the opportunities and limitations of Microsoft 365 Copilot.
The firms most likely to succeed are those that balance productivity gains with strong governance, oversight and professional standards.
The conversation around AI in the legal sector has moved on. The question is no longer whether law firms should explore tools such as Microsoft 365 Copilot.
Instead, firms are asking how they can adopt AI in a way that protects client confidentiality, supports compliance obligations, and delivers practical benefits to employees.
For partners, compliance teams and practice managers, common concerns include:
- Can staff use Copilot with client information?
- What governance should be in place?
- How should AI-generated outputs be reviewed?
- What does the SRA expect?
- How can firms adopt AI without increasing risk?
The good news is that innovation and compliance are not mutually exclusive. With the right controls, policies and training, Microsoft 365 Copilot can help legal professionals work more efficiently while maintaining the professional standards expected by clients and regulators.
What Does Safe Use of Microsoft 365 Copilot Mean?
The safe use of Microsoft 365 Copilot in law firms means using AI in a way that supports existing professional, regulatory and governance requirements. It requires users to understand:
- What Copilot can and cannot do
- When human judgement is required
- How confidentiality obligations still apply
- Why outputs must be reviewed before use
- What responsibilities remain with the individual solicitor
Both the SRA and the Law Society are clear that the introduction of AI does not remove professional obligations. Solicitors remain responsible for the advice they provide, the services delivered to clients, and the supervision of work carried out using technology.
Why Safe Use Matters in Legal and Professional Services
Legal professionals work with highly sensitive information every day, including client correspondence, contracts, litigation documents, employment records and financial data. Protecting that information has always been critical, regardless of whether technology is involved.
The real risk is not necessarily AI itself. It is allowing AI use to develop without clear governance, oversight and guidance. Firms that introduce AI without considering confidentiality, data protection, supervision and risk management may expose themselves to avoidable compliance issues.
The Law Society recommends assessing risks relating to confidentiality, cybersecurity, accountability and the reliability of AI-generated outputs before introducing generative AI into legal workflows. Likewise, the SRA highlights the importance of leadership oversight and ensuring client interests remain central to decisions about technology adoption.
What Microsoft 365 Copilot Can and Cannot Do
One of the most effective ways to support responsible AI use in law firms is to set realistic expectations from the outset.
What Copilot Can Do
Microsoft 365 Copilot can help users:
- Summarise lengthy email chains
- Draft first versions of documents
- Create meeting notes and action lists
- Consolidate information from multiple files
- Assist with internal communications
- Help users find information more quickly across Microsoft 365
What Copilot Cannot Do
Copilot cannot:
- Replace legal expertise
- Make professional judgements
- Guarantee accuracy
- Eliminate the need for review
- Provide legal advice
- Remove supervisory responsibilities
The SRA notes that technology can enhance legal work, but responsibility for legal services remains with the solicitor and firm involved.
Fake case citations before the High Court
Key facts
Five fictitious citations. The High Court found that five cases cited in court documents did not exist.
Barrister involved. The case involved a barrister at Haringey Law Centre.
Judicial finding. Mr Justice Ritchie described the conduct as improper, unreasonable and negligent.
Professional misconduct. Providing descriptions of five fake cases, including a purported Court of Appeal case, could amount to professional misconduct.
Downplayed as "minor." The lawyers continued to rely on the citations after concerns were raised, describing them as "minor citation errors" and "cosmetic errors."
Unchecked AI = negligence. The judge said that if AI had been used and the output not checked, including it in court documents would have been negligent.
Whole-team responsibility. The court emphasised it is the responsibility of the entire legal team, including solicitors, to ensure pleadings and citations are accurate.
Should have been "shocked." The judge said the lawyers should have been shocked when informed the cited cases did not exist.
"This sort of behaviour should not be left unexposed. It undermines the integrity of the legal profession and the courts."
Mr Justice Ritchie⚖️ Outcome
Both the barrister and the law firm were ordered to pay £2,000 each in wasted costs.
The judgment was ordered to be sent to the Bar Standards Board and the Solicitors Regulation Authority (SRA).
Why Staff Need Guidance Before Using AI
Many risks associated with AI stem from user behaviour rather than the technology itself.
Without training and clear guidance, employees may:
- Assume AI-generated content is always correct
- Misunderstand how confidentiality obligations apply
- Use AI in situations where human judgement is essential
- Fail to verify information before sharing it with clients
- Overlook governance requirements and internal policies
A fee earner might use Copilot to summarise a lengthy matter file before a client meeting. That can save significant time, but the summary should still be reviewed to ensure important facts, instructions and risks have not been omitted or misunderstood.
Providing practical guidance helps create consistency across the firm and reduces the likelihood of inappropriate or risky AI use.
Understanding the Limitations of AI in Legal Work
While Microsoft 365 Copilot can improve productivity, understanding its limitations is essential for using Copilot safely with client data and legal matters.
1. AI Cannot Exercise Legal Judgement
Copilot can identify patterns, summarise information and generate draft content, but it cannot apply legal judgement.
For example, it may highlight clauses within a contract, but it cannot determine whether a provision is commercially appropriate, aligns with a client’s objectives, or represents an acceptable level of risk. Those decisions require professional expertise and context.
2. AI Can Produce Inaccurate Information
Like other generative AI tools, Copilot can occasionally generate inaccurate, incomplete or misleading information.
Users should always verify:
- Legal citations
- Legislative references
- Case references
- Dates and deadlines
- Client-facing communications
- Factual statements
The Law Society specifically highlights the importance of reviewing AI-generated content before relying on it in practice.
3. AI Does Not Fully Understand Context
Although Copilot can process large volumes of information quickly, it cannot fully understand the wider commercial, strategic or personal context surrounding a legal matter.
It cannot assess:
- A client’s commercial priorities
- Reputational considerations
- Negotiation strategy
- Personal circumstances
- Firm-specific risk appetite
This is where professional judgement remains essential.
4. AI Cannot Replace Human Relationships
Legal services are built on trust, communication and expert advice.
While Copilot can reduce administrative workloads, it cannot:
- Build client relationships
- Provide tailored reassurance
- Negotiate complex matters
- Exercise discretion
- Deliver professional advice
These remain core strengths of legal professionals.
What Does the SRA Expect When Law Firms Use AI?
A common misconception is that the SRA has introduced a separate set of AI-specific regulations. In reality, existing Principles and Codes of Conduct continue to apply when firms use artificial intelligence — see the SRA’s compliance tips for the use of AI and technology for its current position.
1. Client Confidentiality Still Applies
The duty of confidentiality does not change because AI is involved.
Firms should ensure they have considered:
- Information governance
- Access controls
- Data handling procedures
- Confidentiality requirementsAppropriate user guidance
2. Accuracy Must Be Checked
AI can assist with drafting and summarisation, but every output should be reviewed before use.
This includes checking:
- Facts
- Context
- Relevance
- Legal reasoning
- Completeness
3. Effective Supervision Remains Essential
A useful approach is to treat AI-generated content in the same way you would treat work produced by a junior colleague.
It may provide a useful starting point, but it should still be reviewed and validated before being relied upon.
4. Governance Is a Business-Wide Responsibility
AI adoption should not sit solely with IT.
Successful AI compliance for law firms often involves collaboration between:
- Senior leadership
- Compliance teams
- Risk teams
- COLPs
- IT and information security teams
AI implementation is as much a governance project as it is a technology project.
Practical Principles for Using Copilot Safely
1. Check Permissions and Data Access
One of the most important aspects of Microsoft 365 Copilot security for law firms is understanding that Copilot operates within existing Microsoft 365 permissions. Users can only access content they already have permission to see, making robust access controls and information governance critical.
Copilot data security for legal teams starts with answering key questions:
- Who has access to sensitive information?
- Are permissions reviewed regularly?
- Are files stored in the correct locations?
- Has oversharing been addressed?
- Avoid Over-Reliance on AI Outputs
Copilot should support decision-making, not replace it.
Users should treat outputs as a starting point rather than a finished product.
2. Review Accuracy Before Use
Every AI-generated output should be checked for:
- Accuracy
- Completeness
- Context
- Relevance
- Professional suitability
3. Never Treat Copilot as Legal Advice
Microsoft 365 Copilot is a productivity tool designed to assist users with information and content creation.
It is not a solicitor and should never be relied upon as a source of legal advice.
4. Understand When Not to Use AI
Some matters require particularly high levels of judgement, confidentiality or sensitivity.
Responsible AI use in law firms includes recognising situations where AI assistance may not be appropriate and where work should be completed entirely by qualified professionals.
Why Training Plays Such an Important Role
Many concerns about AI are driven by uncertainty rather than technology.
Employees need clear answers to questions such as:
- What can Copilot help me with?
- What information can I use?
- What needs reviewing?
- When should I avoid using AI?
- What are my responsibilities?
Safe Use of Microsoft 365 Copilot in Law Firms: Compliance Checklist
Before expanding Copilot use across the business, firms should be able to answer “yes” to the following questions:
- Do staff understand confidentiality obligations when using AI?
- Are AI-generated outputs reviewed before use?
- Is there an AI governance policy?
- Have risk and compliance teams been consulted?
- Is responsibility for oversight clearly assigned?
- Are supervision processes in place?
- Do employees understand the limitations of AI?
- Are client interests central to AI adoption decisions?
- Is training available for users?
- Can the firm demonstrate responsible AI governance if challenged?
How Law Firms Can Use Microsoft 365 Copilot with Confidence
The safe use of Microsoft 365 Copilot in law firms is not about avoiding AI. It is about creating the right balance between innovation, governance and professional judgement. Firms that pair clear policies with effective training and oversight are best placed to realise the productivity benefits of Copilot while maintaining client confidentiality, regulatory compliance and high professional standards.
When employees understand both the opportunities and limitations of AI, they are far more likely to use Copilot confidently, responsibly and in ways that genuinely support client service.
Sources
- SRA: Technology and Legal Services
- SRA: Compliance Tips for Solicitors Using Technology and Innovation
- SRA: Artificial Intelligence in the Legal Market
- The Law Society: Generative AI: The Essentials
- The Law Society: AI and Lawtech
- Microsoft: Microsoft 365 Copilot Adoption Guide
- Microsoft Learn: Microsoft 365 Copilot Privacy and Data Protection
- Microsoft Learn: Microsoft 365 Copilot Data, Security and Compliance Requirements
