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How to Fix Microsoft Forms Error 5901 When Adding a Collaborator

Camila Milosovich Oct 8, 2026 868 views

Question details

The user is experiencing Error 5901 when attempting to add a standard group member as a collaborator to a Microsoft Form integrated with Teams Approvals.

How to Fix Microsoft Forms Error 5901 When Adding a Collaborator

Product: Microsoft Forms
Device & OS: not provided
Scenario: Adding a standard group member as a collaborator to a Form used within Teams Approvals.
Observed behavior: The system throws Error 5901. Elevating the member's status to an owner allows access but grants unintended, overly broad permissions.

Before you start

Before proceeding, verify that the individual you are trying to add is an active member of your Microsoft 365 organization and has a valid license assigned.

Solution 1Recommended

Use an Alternative Supported Browser

Browser-specific cache issues or extensions can sometimes trigger false permission errors in Microsoft Forms.

Although this step does not resolve the issue for every user, clearing browser data or switching browsers is the fastest way to eliminate local web environment glitches.

Switch browsers

Open a different supported web browser (such as Microsoft Edge, Google Chrome, or Mozilla Firefox) and navigate to Microsoft Forms.

Use private mode

Alternatively, open an Incognito or InPrivate window in your current browser to ensure no cached credentials or extensions interfere.

Attempt to add collaborator

Open your specific form, click 'Share to collaborate', and try adding the group member again.

Solution 2

Escalate to Microsoft 365 Support

If browser troubleshooting fails, the issue is likely a backend tenant synchronization problem that requires Microsoft's intervention.

Solution 3

Temporary Workaround: Elevate Member to Owner

Changing the user's role from member to owner can bypass the error, allowing them to collaborate immediately.

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While WPS Office does not directly replace Microsoft Forms for Teams Approvals, it serves as a powerful, free alternative for your daily document needs. Create, edit, and collaborate on documents, spreadsheets, and presentations without frustrating permission sync errors.

1. Visit the official website: Go to the official WPS Office website on your computer or mobile device.
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Frequently Asked Questions

What causes Error 5901 in Microsoft Forms?

Error 5901 is typically caused by a backend synchronization issue or a permission validation failure within the Microsoft 365 tenant when verifying a standard group member's rights to collaborate on a specific form.

Can I fix Error 5901 without an administrator?

You can try basic local troubleshooting like switching web browsers, using an incognito window, or clearing your browser cache. If these do not work, you must involve an administrator to contact Microsoft Support.

Is it safe to make a member an owner to bypass this error?

While it serves as a functional temporary workaround, it is generally unsafe for strict data governance. Making someone an owner gives them full control over the Microsoft 365 Group, including the ability to delete content or manage other users' access.

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