How to Audit Permissions for Shared Documents
Shared documents make collaboration fast, but they also create hidden access risk.
This guide explains how to audit permissions for shared documents so you can spot oversharing, verify ownership, and keep sensitive files under control.
Why permission audits matter
Document sharing often expands over time through edits, comments, external links, and inherited folder access.
In platforms like Google Workspace, Microsoft 365, SharePoint, OneDrive, Dropbox, and Box, a file can end up visible to more people than the original owner intended.
A permission audit helps you answer four core questions:
- Who can view, comment on, or edit the document?
- Which users are internal, external, or anonymous?
- Which access paths are direct, inherited, or link-based?
- Which files contain sensitive or regulated information?
What to review before you start
Before you audit, define the scope.
Start with documents that contain financial data, customer records, contracts, HR files, intellectual property, or confidential project material.
Then identify the systems that host them.
- Google Drive and Google Workspace
- Microsoft OneDrive, SharePoint, and Teams files
- Dropbox, Box, and similar cloud storage platforms
- Network drives and document management systems
It also helps to know your organization’s access policy.
Many companies use role-based access control, least privilege, and data classification rules to determine what should be shared and with whom.
Step 1: inventory the shared documents
Start with a complete list of documents that are shared beyond a single owner.
In larger environments, use admin consoles, activity reports, or discovery tools to export file inventories with metadata such as owner, location, sharing status, and last modified date.
For smaller teams, create a manual inventory with these fields:
- Document name
- Owner
- Storage location
- Sharing method
- Last access or last update
- Sensitivity level
This inventory becomes the baseline for the rest of the audit and helps you spot stale files that no longer need broad access.
Step 2: identify who has access
Open each file’s sharing settings and list every person, group, and link that can reach the document.
Pay attention to access level because view-only, comment, and edit permissions carry very different risk profiles.
Common permission types
- Viewer: Can open and read the file
- Commenter: Can annotate or review without changing the core content
- Editor: Can modify content, potentially share further, or remove others
- Owner: Can change permissions and transfer control
Also check for group-based access.
A shared file may appear limited to a team, but the team itself could include contractors, temporary staff, or users from multiple departments.
Step 3: separate internal, external, and public exposure
One of the most important parts of auditing permissions for shared documents is determining whether access extends beyond your organization.
External sharing is often where compliance and confidentiality risks increase.
Classify access into these categories:
- Internal: Users with company accounts only
- External: Guests, partners, vendors, or clients
- Public: Anyone with the link or anyone on the internet
Public links are especially risky because they may be forwarded, indexed, or reused long after the file was meant to be temporary.
In tools like Google Drive and Microsoft 365, check whether the link is restricted, organization-only, or open to anyone.
Step 4: check inherited permissions and folder structure
A document may not be directly shared at all; it may simply inherit access from a parent folder, library, workspace, or team site.
This is common in SharePoint, OneDrive for Business, Box folders, and network file shares.
When auditing, trace each file back to its parent container.
Ask whether the folder structure reflects actual business need.
Inherited access is useful for productivity, but it can also expose files to entire departments when only a small project group should see them.
If a parent folder is overly broad, consider one of these actions:
- Move the file into a more restricted folder
- Break inheritance for the specific file
- Redesign the folder structure around teams or projects
Step 5: review editing, sharing, and download rights
Not all permission settings are obvious from the file list.
Some tools allow editors to reshare documents, change link settings, download files, copy content, or invite new collaborators.
These secondary privileges can be more dangerous than read access alone.
Look for settings such as:
- Allow editors to share
- Allow viewers to download, print, or copy
- Link expiration dates
- Password-protected links
- Restricted access by domain or group
For sensitive content, reduce permissions to the minimum required and disable reshare where possible.
That aligns with least privilege and reduces the chance of uncontrolled expansion.
Step 6: validate ownership and stale access
Ownership matters because owners usually control permission changes, retention, and transfer rights.
If a file owner has left the company or changed teams, the document may have outdated settings that no one is actively managing.
Check for:
- Files owned by former employees
- Documents with no recent access
- Shared links that have not been used
- Temporary project files that remain open indefinitely
Many organizations use access reviews or attestation workflows to confirm that each permission is still needed.
If a document has not been touched in months, it may be time to remove access or archive it.
Step 7: use logs and alerts to confirm risky behavior
Permission settings show what could happen; audit logs show what actually happened.
Review file activity logs for unusual access patterns, such as downloads from new locations, mass sharing, permission changes, or access outside business hours.
Useful signals include:
- Repeated access by unknown accounts
- Rapid permission expansion
- External sharing of sensitive folders
- File downloads from large groups
- Changes to link settings or ownership
If your platform supports it, turn on alerts for external sharing, public link creation, and permission changes.
These controls help security teams respond faster and support continuous monitoring after the audit.
Step 8: remediate and document the results
After identifying issues, fix them in a controlled order.
Prioritize public links, external access to confidential files, and editor rights that are broader than necessary.
Then document what changed so the next review is faster and more consistent.
Track remediation with a simple record:
- File or folder name
- Risk identified
- Access removed or reduced
- Person responsible
- Date resolved
Documentation is especially important for audits tied to compliance frameworks such as SOC 2, ISO 27001, HIPAA, or GDPR, where evidence of access control is often required.
Best practices for ongoing permission management
A one-time audit helps, but regular reviews are more effective.
Establish a recurring process so shared documents do not drift back into risky states.
- Review sensitive files monthly or quarterly
- Use data classification labels to flag confidential content
- Limit link sharing by default
- Apply role-based access control where possible
- Remove permissions when projects end
- Require approval for external sharing
Automation can help too.
Many organizations use identity governance tools, data loss prevention systems, and cloud access security brokers to detect oversharing and enforce policy at scale.
What should you ask during a permission audit?
Use a consistent checklist to keep reviews thorough and repeatable.
These questions help reveal hidden risk:
- Who is the owner of this document?
- Why does each person or group need access?
- Is any external sharing active?
- Can editors reshare the file?
- Is access inherited from a broader folder?
- Has the file been used recently?
- Should this document be archived or deleted?
By following a structured process, you can audit permissions for shared documents with less guesswork and more confidence.
The goal is not to eliminate collaboration, but to make sure every shared file has a clear business purpose and a controlled audience.