Publish Date
26/08/2026
Categories
Blogs
AI is only as useful as the information behind it.
As more organisations start using Microsoft Copilot, many IT teams are asking the same question:
How do we make sure Copilot is using the right information?
Microsoft’s new Authoritative SharePoint Sites feature is designed to help answer exactly that.
In simple terms, it gives organisations a way to tell Copilot:
“This is where the official information lives.”
When Copilot searches for information to answer a question, content from these designated sites can be prioritised, helping users find trusted and relevant information more quickly.
What’s the challenge?
Most organisations don’t have a single source of truth.
Policies get copied, documents get downloaded and re-uploaded, or teams create their own versions of templates. Someone might have an old document saved in a project site from three years ago.
The result?: Multiple versions of the same information living across SharePoint, Teams and OneDrive.
Without clear governance, users may not know which version is correct. As AI becomes more embedded in daily work, that challenge becomes even more important because Copilot can only work with the content it can find.
What are Authoritative Sites?
Authoritative Sites allow SharePoint administrators to identify specific SharePoint sites as trusted organisational sources.
These might include:
- HR policies
- Corporate communications
- Legal precedent libraries
- Information governance guidance
- IT standards and procedures
- Knowledge management repositories
Once marked as authoritative, these sites become the locations Copilot can recognise as containing approved organisational knowledge.
Why IT teams should care
Many organisations focus on the AI itself. In actual fact, the bigger challenge is often the data behind it (and once an organisation uses AI, they start to see the risks that were once hidden).
Authoritative Sites encourage IT teams to think about:
- Where trusted information is stored
- Who owns that information
- How often it is reviewed
- Whether old content is archived
- Which repositories should be considered ‘the source of truth’
In reality, this is as much a governance conversation as it is an AI conversation.
The organisations getting the most value from Copilot are often the ones that have invested time in organising their M365 environment and managing this knowledge.
It works alongside other governance controls
One of the most interesting aspects of this feature is that it complements existing controls that work in the opposite direction.
Authoritative Sites help elevate trusted content, but other controls help restrict content.
For example, organisations can use Restricted SharePoint Search to limit which SharePoint sites Copilot and enterprise search can surface. This can provide a temporary way to control exposure while permissions, ownership and governance are being reviewed.
Together, these controls provide a balanced approach:
Authoritative Sites
- Promote trusted information
- Improve confidence in search results
- Help establish a ‘source of truth’
Restricted Search
- Reduce visibility of content
- Limit access to unmanaged repositories
- Support governance and clean-up projects
One helps Copilot find the best information and the other prevents it finding the wrong information.
Authoritative doesn’t mean unrestricted
It’s important to understand what this feature doesn’t do.
Marking a site as authoritative:
✅ Helps identify trusted content
✅ Supports better search relevance
✅ Improves confidence in Copilot responses
❌ Does not override permissions
❌ Does not grant users additional access
❌ Does not replace content ownership
❌ Does not guarantee content accuracy
If information is outdated, inaccurate or poorly maintained, Copilot can still surface it.
That’s why content ownership, review cycles and governance remain critical.
Example of using Authoritative Sites
Imagine a sales or account management team asks Copilot:
“What are the latest security certifications our company holds?”
Across Microsoft 365 there might be:
- An approved accreditation and compliance site
- An old proposal from two years ago
- A draft marketing document
- A spreadsheet somebody saved in a project folder
Without guidance, Copilot could potentially find multiple references to the same topic.
By marking the official compliance and accreditation repository as an Authoritative Site, you’re helping Copilot prioritise information from the location that contains the approved, current details.
This gives users greater confidence that the information they’re using in customer conversations, bids and proposals is based on the latest approved content.
A good place to start
If you’re planning a Copilot rollout or even pilot, ask yourself three simple questions:
- Which SharePoint sites contain our approved organisational knowledge?
- Who owns and maintains those repositories?
- Could users identify the correct version of information today without AI?
If those questions are difficult to answer, Authoritative Sites could be a useful first step.
Final thoughts
Many Copilot conversations focus on prompts, licences and new AI features.
Of course those things matter, but the quality of Copilot’s answers will always depend on the quality of the content behind them.
Authoritative SharePoint Sites give IT teams a practical way to identify trusted repositories and strengthen the foundations of AI adoption.
Because before organisations ask whether Copilot is ready, they should ask whether their knowledge is organised, governed and trusted.