Permission & Access Issues

How to Prevent Users from Repeatedly Losing SharePoint Site Access

John Wilson Oct 13, 2026 868 views

Question details

Internal users are unexpectedly losing their access rights to a SharePoint site and must repeatedly request permission to enter.

How to Prevent Users from Repeatedly Losing SharePoint Site Access

Product: Microsoft SharePoint
Device & OS: not provided
Scenario: Managing internal user permissions and site access across Microsoft 365 groups.
Observed behavior: Users are continually dropped from the access list without administrator intervention, forcing them to repeatedly request site access to continue their work.

Before you start

Ensure you have SharePoint Administrator or Site Owner privileges before attempting to modify user access levels. It is also helpful to determine whether the access issue is occurring on a single site or across multiple SharePoint Online sites.

Solution 1Recommended

Review and Reset User Permissions in SharePoint and M365 Groups

Audit the affected users' permission sources to identify conflicts from AD groups or direct assignments, and re-establish clean access.

In many cases, users drop off the access list due to conflicting permission structures. A user might be granted access directly but denied or removed via a background synchronization with an Active Directory (AD) group or a Microsoft 365 group policy.

Review the Microsoft 365 Group

Go to the Microsoft 365 admin center, navigate to 'Teams & groups' > 'Active teams and groups', locate the group associated with the SharePoint site, and verify if the affected users are listed consistently as members.

Check SharePoint People and Groups

Navigate to your SharePoint site. Click the gear icon for 'Settings' > 'Site permissions', then click 'Advanced permissions settings' to open the People and Groups page.

Identify Conflicting Permissions

Look for the user's name across different SharePoint groups, Active Directory groups, and direct assignments to see if overlapping access policies or dynamic group rules are causing the system to periodically revoke access.

Remove and Re-add Users

In the Advanced permissions settings, select the affected user, click 'Remove User Permissions' on the ribbon, and then click 'Grant Permissions' to re-add them cleanly to the appropriate group.

Review and Reset User Permissions in SharePoint and M365 Groups

Active Directory Sync Consideration: If your organization uses Active Directory synchronization, ensure that the user's AD group membership is stable. Background syncs can sometimes overwrite manual SharePoint permissions, causing the recurring access loss.

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Frequently Asked Questions

Why do users randomly lose access to a SharePoint site?

This typically happens due to conflicting permissions across overlapping Active Directory groups, automated sync scripts overriding manual group memberships, or Conditional Access policies revoking permissions based on user state, device, or network location.

How can I check a user's exact permission level on a SharePoint site?

Go to Site Settings > Site permissions > Advanced permissions settings. Click on 'Check Permissions' in the top ribbon, enter the user's name or email, and click 'Check Now' to see exactly what permission levels they have and how those permissions were granted.

Does removing and re-adding a user to reset permissions delete their files?

No. Removing a user's permission from a SharePoint site only revokes their access to view or edit the site content. Any files they previously uploaded, created, or modified will remain completely intact on the site.

Document & File Issues