License & Subscription Issues

Fix Microsoft Teams Project Custom Column Read-Only Issue

Maira Mehtab Sep 25, 2026 869 views

Question details

Team members are unable to edit custom columns within Microsoft Teams projects, despite being able to add tasks and modify standard fields.

Product: Microsoft Teams / Microsoft Project
Device & OS: not provided
Scenario: Editing custom project columns and managing tasks within Microsoft Teams channels.
Observed behavior: Custom columns display a read-only message and cannot be modified by users who can otherwise edit default project fields.

Before you start

Ensure you have Microsoft 365 administrative privileges to check and assign user licenses, as this restriction is typically tied to subscription levels.

Solution 1Recommended

Assign or Verify Microsoft Project Licenses

The most common cause for read-only custom columns is a missing Project license for the affected team members.

Testing indicates that while users without a Project license can edit default fields, they are restricted from modifying custom fields. Assigning the proper license restores editing access.

Access Admin Center

Locate the User

Navigate to the 'Users' section in the left-hand menu and select 'Active users'.

Assign Project License

Select the affected user, click on the 'Licenses and apps' tab, check the box for Microsoft Project, and save the changes.

Assign or Verify Microsoft Project Licenses

Synchronization Time: It may take a few minutes for the newly assigned license permissions to sync and restore editing access in Microsoft Teams.

Solution 2

Test New Projects and Field Types

If licensing is correct, isolate the issue by testing alternative column types and creating a fresh project.

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Frequently Asked Questions

Why can I edit standard fields but not custom columns in Teams?

Standard project fields are generally accessible to all project members by default. However, modifying custom columns is a premium feature that requires an active Microsoft Project license assigned to your user account.

How long does it take for a newly assigned Project license to work?

Once a Microsoft 365 administrator assigns a Project license, it typically takes just a few minutes for the system to synchronize and grant you access to edit custom columns in Teams.

Does the custom field type affect the read-only error?

Usually, no. Testing indicates that if a user lacks the proper Project license, the read-only restriction persists across all custom field types, including text, choice, and number formats.

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