Article summary: Microsoft 365 Copilot and similar AI tools can only see what a signed-in user is already permitted to see, which means years of loose sharing settings become instantly searchable the moment AI goes live. A Microsoft 365 permissions audit before rollout finds and fixes that exposure ahead of time. Businesses that complete this review avoid handing every employee a shortcut into records they were never meant to open.
A supply company recently tested Microsoft Copilot with five employees. A few days into the pilot, one employee asked it to summarize everything related to a specific contract.
The results included something that had nothing to do with the contract: a colleague’s performance review, accidentally saved in the same folder years earlier.
Copilot did not hack its way into a restricted file. It simply found information the employee already had permission to access
That is where AI can expose problems that have been hiding inside Microsoft 365 for years. Old sharing links, overly broad permissions, and misplaced files may go unnoticed until an AI assistant makes them much easier to find.
Before you roll out business AI, a Microsoft 365 permissions audit can show you exactly what your employees, and the AI tools working on their behalf, can access.
What Changes Once AI Joins Microsoft 365
Copilot and other AI assistants built into Microsoft 365 do not get a separate set of permissions. They inherit whatever the signed-in user can already access across email, Teams, SharePoint, and OneDrive.
Microsoft’s own documentation confirms that SharePoint and OneDrive access controls shape what Copilot can discover, without changing a user’s underlying permissions.
That distinction is important. AI does not give employees access to new information. It makes the information they can already access much easier to find, including files and permissions that may have been overlooked for years.
Where Permission Sprawl Happens in Microsoft 365
Most small businesses do not create excessive access intentionally. It builds up gradually through everyday changes in how people work, share files, and collaborate. Here are some of the most common places permission sprawl starts to appear.
Sites shared with “everyone”
A SharePoint site gets set to organization-wide sharing during a rushed project launch, and nobody circles back to narrow it once the project ends. The setting outlives the reason it was created.
Stale guest and former-employee access
Access granted to contractors, former employees, and vendors can easily be overlooked when a working relationship ends. These forgotten permissions are easy to overlook until AI makes the information behind them much easier to find.
Broken permission inheritance
A SharePoint folder can end up with broader access than the library around it after permissions are changed for a project or specific user. Those exceptions are easy to forget and may remain in place for years.
Concentric AI found that 16% of business-critical data in its analysis was overshared, representing an average of 802,000 files per organization. Its Data Risk Report analyzed more than 550 million records, highlighting how much excessive access can accumulate before AI makes that information easier to find.
Running the Audit Before You Flip the Switch
A pre-deployment audit does not have to be complicated. It starts with a structured review of a few key areas.
- Review SharePoint and OneDrive sharing settings. Look for sites and libraries shared company-wide, along with any “anyone with the link” sharing that was never meant to be permanent.
- Check guest and inactive account access. Remove or downgrade access for contractors, former employees, and accounts that have not signed in for months.
- Confirm folder-level permissions match the parent library. Broken inheritance is one of the most common causes of accidental exposure.
- Pilot with a narrow group first. Test Copilot or any AI assistant with a small team whose access profile you have already reviewed, rather than your most senior staff with the broadest reach across the business.
Microsoft publishes permission state reporting tools inside Microsoft 365 that surface broken inheritance, public links, and excessive group access, turning this into a documented review of what needs attention before deploying AI.
A Microsoft 365 permissions audit is really an extension of identity and access management fundamentals your business should already practice, applied with AI-specific stakes in mind.
Why Canadian Businesses Cannot Skip This Step
As more Canadian businesses adopt AI, reviewing existing permissions before deployment is becoming increasingly important.
Statistics Canada reports that 19.2% of Canadian businesses used AI to produce goods or deliver services in the 12 months leading up to the second quarter of 2026, up from 6.1% two years earlier.
That means AI adoption has roughly tripled in just two years, making it increasingly important for businesses to review existing permissions before introducing AI into their Microsoft 365 environment.
The Canadian Centre for Cyber Security also recommends limiting AI access to private data and using strong identity and access controls. Its guidance reinforces the same principle behind a Microsoft 365 permissions audit: AI should not have broader access to sensitive information than necessary.
For businesses already handling client records under PIPEDA, a permissions review pairs naturally with a closer look at how AI tools handle the personal information fed into them once access is confirmed.
Ready to Deploy AI Without the Guesswork?
AI adoption is moving quickly, but a faster rollout should not come at the expense of proper access controls. Reviewing Microsoft 365 permissions first can help prevent old sharing decisions and excessive access from becoming bigger problems once AI is introduced.
A permissions audit is not about slowing down AI adoption. It is about knowing what your AI tools may be able to find before employees start using them.
If you are planning a Copilot rollout or are not sure who can access what across Microsoft 365 today, Haxxess can help identify permission gaps and address them before AI makes them easier to uncover.
Call us at 705-222-8324 or contact us here to get started.
Article FAQs
Does Copilot create new security risks in Microsoft 365?
Copilot does not bypass permissions or create new access on its own. It works within whatever a signed-in user is already permitted to see, which means it tends to expose oversharing and permission sprawl that already existed rather than introducing a new vulnerability.
How long does a Microsoft 365 permissions audit take for a small business?
For most small and medium businesses, a focused review of SharePoint sharing settings, guest access, and folder inheritance can be completed within a few days. The timeline depends on how many sites and libraries have accumulated over the years.
Should we wait to deploy AI until every permission issue is fixed?
Not necessarily. Many businesses run a narrow pilot with a small, carefully reviewed group while the wider audit continues in the background, then expand access gradually as sharing settings are corrected.
