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Fix Microsoft Planner Item or Storage Limit Exceeded Error

Tauseeq Magsi Oct 10, 2026 868 views

Question details

Users encounter an error in Microsoft Planner stating that a request could not be completed because an item or storage limit was exceeded.

Fix Microsoft Planner Item or Storage Limit Exceeded Error

Product: Microsoft Planner
Device & OS: not provided
Scenario: Updating a project plan, adding new tasks, or managing buckets within Microsoft Planner.
Observed behavior: An error message appears reading 'We couldn't complete your request because your item or storage limit has been exceeded', preventing the user from saving updates or adding items to the plan.

Before you start

Ensure you have Microsoft 365 administrator privileges in case you need to verify backend limits or submit a support ticket to Microsoft.

Solution 1Recommended

Review Plan Items and Reduce Usage

Check your current Microsoft Planner usage and delete excessive tasks or buckets to free up space and stay within limits.

Microsoft Planner has hard limits on the number of active tasks, completed tasks, and buckets a single plan can contain. Exceeding these thresholds triggers the storage limit error.

Access your Microsoft Planner

Review active items

Check the total number of tasks, buckets, and attachments currently stored in your active plan.

Clean up unnecessary data

Delete old, completed tasks, remove unnecessary file attachments, or consolidate buckets to ensure your plan falls below the maximum allowed limits.

Planner Service Limits: Consult the official Microsoft Planner limits documentation online, as the maximum threshold for items like tasks and buckets can vary depending on your specific Microsoft 365 subscription tier.

Solution 2

Test Planner in an Alternative Web Browser

Rule out localized browser cache or session issues that might trigger a false storage error.

Solution 3

Submit a Microsoft 365 Support Request

If your plan has clearly not reached any item limits but the error persists, request a backend investigation from Microsoft.

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Frequently Asked Questions

What is the maximum number of tasks allowed in a Microsoft Planner plan?

Microsoft Planner enforces hard limits on the number of active tasks, completed tasks, and buckets. Because these numbers are periodically updated by Microsoft, you should check the official Microsoft Planner limits documentation for the exact threshold corresponding to your current subscription.

Does deleting completed tasks free up storage in Planner?

Yes. Removing old, unnecessary, or completed tasks helps reduce your total item count. This can resolve the 'storage limit exceeded' error if your plan was hitting the maximum allowed task cap.

Why does the storage error persist even though my Planner plan is very small?

If you have verified that your plan contains only a few tasks and buckets but you still receive the limit error, the issue is likely a backend synchronization glitch on Microsoft's servers. You will need to contact Microsoft 365 support through the Admin Center to resolve it.

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