Fix SharePoint Full Control Users Cannot Add Site Users
Question details
Users granted Full Control permissions in SharePoint are unable to add new users or manage site permissions.
- Product
- Microsoft SharePoint
- Device & OS
- not provided
- Scenario
- A user attempts to add new members or modify permissions on a SharePoint site using an account that has been granted Full Control.
- Observed behavior
- The user is prevented from adding site members or editing permissions, despite having Full Control rights. Sometimes the page loads briefly but fails to send an email or add the user.
Verify whether the affected user is an internal user or an external guest, as SharePoint enforces strict limitations on guest accounts regardless of their permission level.
Manage Permissions with an Internal Account
Because SharePoint restricts guest users from managing site permissions even with Full Control, permission management must be handed over to an internal account.
Microsoft SharePoint architecture intentionally restricts external guest users. Even if a guest user is assigned to the Full Control group, they cannot perform administrative tasks like adding new users or modifying site permissions.
Find an internal user who has Site Owner or Full Control rights on the SharePoint site.
Have the internal user log into the SharePoint site and manage all user invitations and permission changes.
If a specific user absolutely must manage site members, ask your IT administrator to provision a standard internal account for them rather than using a guest account.
Remove and Re-invite the Affected User
If an internal user with Full Control is experiencing this issue, resetting their site permissions may resolve underlying configuration glitches.
Looking for a Lightweight Alternative for Your Office Documents?
While SharePoint manages your site and file sharing, WPS Office is an excellent, free alternative for creating and editing your Word, Excel, and PowerPoint documents with full format compatibility.
- 1. Download WPS Office: Visit the official WPS website and download the free installation package for your operating system.
- 2. Install the software: Run the installer and follow the on-screen instructions to set up WPS Office on your computer.
- 3. Open and edit files: Launch WPS Office to easily open, edit, and save your existing Word, Excel, and PowerPoint documents downloaded from your SharePoint sites.
Frequently Asked Questions
Why can't external guest users add members to a SharePoint site?
Microsoft SharePoint intentionally restricts the administrative capabilities of guest accounts for security reasons. Even if a guest is granted Full Control, they are blocked from managing site permissions or inviting new members.
How do I give an internal user Full Control in SharePoint?
Navigate to Settings > Site permissions > Invite people > Share site only. Type the user's name, expand the permission dropdown arrow, select Full control, and click Add.
How do I access Advanced Permissions Settings in SharePoint?
You can access Advanced Permissions Settings by going to the gear icon (Settings), clicking Site permissions, and selecting the 'Advanced permissions settings' link at the bottom of the pane. Here, you can add users directly to specific permission groups.
