Fix Recoverable Items Quota and Deleted Email Problems in Exchange Online
Question details
The user needs to resolve a full Recoverable Items folder that prevents permanent deletion of Deleted Items and blocks an Exchange migration.
- Product
- Microsoft Exchange Online / Microsoft 365 mailbox
- Device & OS
- not provided
- Scenario
- An administrator or user is trying to permanently delete messages and complete an Exchange migration, but the hidden Recoverable Items folder is over quota.
- Observed behavior
- Deleted Items remain in the mailbox after deletion attempts, and the Exchange migration fails with a Recoverable Items quota error.
Confirm you have Exchange Online administrator or equivalent permissions, and review retention policies, litigation holds, and compliance requirements before running cleanup commands.
Check Recoverable Items Quota, Retention Policies, and Mailbox Holds
Use this first to confirm whether the Recoverable Items folder is full and whether retention or legal hold requirements protect the mailbox before deleting anything.
In Windows PowerShell, run `Connect-ExchangeOnline` and sign in with an Exchange Online administrator account.
Run `Get-MailboxFolderStatistics -Identity user@contoso.com -FolderScope RecoverableItems | Format-List Name,FolderAndSubfolderSize,ItemsInFolderAndSubfolders` and check whether the folder is near or over quota.
Run `Get-Mailbox -Identity user@contoso.com | Format-List LitigationHoldEnabled,InPlaceHolds,RetentionPolicy` and review the output before any cleanup operation.
Clean Up Recoverable Items in Exchange Online and Retry the Migration
Use this after confirming that no retention, litigation hold, or compliance policy prevents deletion; it directly targets the full Recoverable Items folder.
Resolve Exchange Online Mailbox Issues, Then Use WPS Office Free for Daily Document Tasks
WPS Office cannot change Exchange Online mailbox quotas, but it offers a free, lightweight Microsoft Office alternative with familiar editing tools, strong file compatibility, and simple document migration for everyday work.
- 1. Visit the WPS Office download page: Go to https://www.wps.com and select Download WPS Office Free for your operating system.
- 2. Install WPS Office: Open the downloaded installer and follow the on-screen setup instructions.
- 3. Open Microsoft Office documents: Launch WPS Office and open existing Word, Excel, and PowerPoint files; they remain compatible with Microsoft Office formats.
Frequently Asked Questions
Why can't I permanently delete messages from Deleted Items in Exchange Online?
Usually the Recoverable Items folder is full or near its quota, so Exchange retains deleted messages instead of purging them. Check the folder size with Get-MailboxFolderStatistics -FolderScope RecoverableItems and review retention or hold settings.
What is the Recoverable Items folder or mailbox dumpster?
It is a hidden mailbox area that stores items removed from Deleted Items and other folders so they can be recovered or preserved for compliance. It includes subfolders such as Deletions, Purges, and Versions.
Does the SearchDumpsterOnly parameter delete Recoverable Items by itself?
No. SearchDumpsterOnly only limits the search to the Recoverable Items folder. Deletion requires a cleanup action, such as -DeleteContent with Search-Mailbox or a purge action in the compliance center, and must respect holds and retention policies.
What should I check before cleaning the Recoverable Items folder?
Confirm you have Exchange Online administrator permissions, then check retention policies, litigation holds, and compliance requirements. Deleting protected items can cause legal or data loss issues.
My Exchange migration still fails after cleanup. What should I do next?
Re-check Recoverable Items folder statistics, confirm the cleanup actually reduced the size, and make sure no hold is still preventing deletion. Then retry the migration batch or migration request.
