OneDrive File Issues

Fix OneNote Account Out of Storage Error When Space is Available

Adam Davis Oct 10, 2026 870 views

Question details

OneNote displays an 'account is out of storage' error despite having ample space remaining in the Microsoft 365 1 TB quota.

How to Fix OneNote 'Account is Out of Storage' Error When Quota is Not Full

Product: Microsoft OneNote and OneDrive
Device & OS: Mac and Windows
Scenario: Attempting to sync OneNote notebooks across Mac and Windows devices using a Microsoft 365 account.
Observed behavior: Synchronization fails and OneNote reports that the account has no storage available, even though the user is well below the 1 TB limit.

Before you start

Ensure you have your Microsoft account credentials handy, as you will need to sign out and sign back in on both your Mac and Windows devices.

Solution 1Recommended

Verify Storage Online and Re-authenticate Devices

A common cause of false quota reporting is an authentication glitch or a delayed sync between OneDrive and OneNote.

Sometimes the local OneNote application loses its connection to the Microsoft 365 storage backend, causing it to display an inaccurate storage quota. Forcing a manual re-authentication usually refreshes the storage metrics.

Check Storage Online

Log in to OneDrive.com using a web browser and check the storage metrics at the bottom left corner to confirm your 1 TB quota is active and has available space.

Sign Out of OneNote

Open OneNote on both your Windows and Mac devices. Go to Account settings and click 'Sign Out' on all connected Microsoft accounts.

Sign Back In

Restart the OneNote application and sign back in using the correct Microsoft 365 account credentials to force a quota refresh.

Verify Storage Online and Re-authenticate Devices

Check Multiple Accounts: Ensure you are signing in with the exact same account on both devices, as mixing up personal and business accounts can trigger storage errors.

Solution 2

Update OneNote and OneDrive Applications

Outdated applications can suffer from known sync and quota-reporting bugs that have been patched in newer releases.

Solution 3

Contact Microsoft Support for a Backend Reset

If local troubleshooting fails, the Microsoft 365 backend storage quota may be misconfigured and requires a manual reset by their support team.

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Frequently Asked Questions

Why does OneNote say my storage is full when it isn't?

This is typically caused by an authentication error, an outdated OneNote application, or a delayed backend synchronization glitch between OneDrive and Microsoft 365 services.

Does OneDrive storage directly affect OneNote?

Yes, OneNote notebooks are stored within your OneDrive account. If OneDrive is experiencing quota reporting issues, OneNote will fail to sync and display a storage error.

How do I check my actual Microsoft 365 storage?

Log into your Microsoft account online, navigate to the OneDrive storage metrics page via the settings gear icon, and verify your total usage against the 1 TB quota.

Document & File Issues