SharePoint Document Issues

How to Remove the i:0#.f|membership| Prefix from SharePoint Person Fields

Maira Mehtab Oct 9, 2026 869 views

Question details

The user needs to remove the claims authentication prefix (i:0#.f|membership|) appearing before user names in SharePoint fields.

How to Remove the i:0#.f|membership| Prefix from SharePoint Person Fields

Product: Microsoft SharePoint
Device & OS: not provided
Scenario: Viewing or editing a SharePoint list or document library that contains a Person or Group column.
Observed behavior: The Person or Group column displays the internal prefix 'i:0#.f|membership|' before the user's name instead of just showing the display name.

Before you start

Determine whether your SharePoint list form has been customized using Microsoft Power Apps, as custom formulas are the most common cause of this specific display issue.

Solution 1Recommended

Review and Fix Power Apps Customizations

Use this solution if your SharePoint list form was modified with Power Apps and is pulling the internal claims token instead of the display name.

When a SharePoint form is customized in Power Apps, the Person or Group column might default to displaying the claims identifier rather than the user's actual display name. Updating the field's property to target the DisplayName attribute will resolve this.

Open form in Power Apps

Navigate to your SharePoint list, click on 'Integrate' in the top menu, select 'Power Apps', and choose 'Customize forms'.

Locate the Person field

In the Power Apps Studio, select the DataCard associated with the Person or Group column that is incorrectly displaying the prefix.

Update the display property

Select the specific text label or combo box within the DataCard. Change the 'Text' or 'Default' property formula to reference '.DisplayName' (for example, ThisItem.PersonField.DisplayName) instead of the raw claims output.

Publish changes

Save your Power Apps solution and click 'Publish to SharePoint' to apply the fix to your live list.

Review and Fix Power Apps Customizations

Community Assistance: If you are unsure of the correct formula syntax for your specific app setup, you can ask for tailored advice in the official Power Apps Community forums.

Solution 2

Contact Microsoft 365 Support with HAR Logs

Proceed with this step if your SharePoint form relies on the default interface (no Power Apps customizations) and still shows the claims prefix.

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Frequently Asked Questions

What does 'i:0#.f|membership|' mean in SharePoint?

It is a claims-based authentication identifier used internally by SharePoint and Microsoft 365 to uniquely identify users in the system. Normally, SharePoint maps this identifier to the user's actual display name in the user interface.

Can I use calculated columns to extract the display name and hide the prefix?

While it is possible in some older SharePoint environments to use string manipulation formulas (like =REPLACE or =MID) to strip the prefix out into a new calculated column, it is generally recommended to fix the root cause via Power Apps or Microsoft Support to ensure proper functionality.

Why does this prefix only appear for certain users in my list?

This partial issue often happens when specific user profiles fail to sync correctly from Microsoft Entra ID (formerly Azure Active Directory) to the SharePoint User Profile Service, causing SharePoint to fallback to displaying their raw claims identifier.

Document & File Issues