Click outside the label-name field instead of pressing Enter; in the directly matching Planner issue, Enter did not persist the edit, while clicking elsewhere saved the new name.^1^
Rename and save the label
- Open the affected plan in Planner.
- Open any task in that plan.
- Select Add label.
- Select the pencil icon beside the label.
- Delete the old text and enter the new name.
- Click elsewhere in the task pane—do not press Enter.
- Refresh the Planner page, reopen a task, and verify that the new name remains.
This exact save method resolved the same “reverts after pressing Enter” behavior.^2^
There is no need to delete or reset all the labels again. Label names are defined at the plan level: renaming a color changes every use of that label within the current plan, and labels defined on one task become available to every task in that plan.^3^
If clicking outside still does not save
Since deleting the labels and restoring their color names did not help, test a different session rather than repeating that reset:
- Open an InPrivate/Incognito browser window.
- Sign in to Planner and open the same plan.
- Rename one label, then click outside the field.
- Refresh and check whether it persisted.
Also test whether the problem affects:
- Only this plan or every plan.
- Only Planner on the web or also the Planner/Tasks tab in Microsoft Teams.
If it works in a private window, the issue is isolated to the normal browser profile or session. If it fails across browsers and clients, it may require service-side investigation.
Escalate if the label still reverts
A Microsoft 365 administrator should first check Microsoft 365 admin center → Health → Service health. If no relevant incident appears:
- Open Microsoft 365 admin center.
- Select Help & support.
- Describe the issue, including the affected plan, browsers tested, and that clicking outside the field still does not persist the label.
- If the suggested results do not resolve it, select Contact Support and choose phone or email.
Microsoft documents that these business-support methods require an administrator; subscriptions purchased entirely through a partner must be escalated through that partner.^4^
References
- Renaming Labels in Microsoft Planner - Microsoft Q&A
- Why aren't the labels in Planner updating when I try to rename them ...
- Flag your tasks with labels | Microsoft Support
- Get support for Microsoft 365 for business