Email Recovery

How to Recover Missing Microsoft 365 Exchange Online Emails

John Wilson Sep 29, 2026 869 views

Question details

Users or administrators need to find and restore missing emails in Microsoft 365 Exchange Online that may have been misplaced, deleted, or blocked.

How to Recover Missing Microsoft 365 Exchange Online Emails

Product: Microsoft 365 Exchange Online
Device & OS: not provided
Scenario: Emails are missing from a user's mailbox due to accidental deletion, overly aggressive mailbox rules, or delivery issues.
Observed behavior: Expected emails do not appear in the inbox, requiring administrators and users to use message tracing or recovery folders to locate them.

Before you start

Ensure you have Microsoft 365 administrator privileges if you need to run organizational message traces or review audit logs.

Solution 1Recommended

Check Deleted Items, Recoverable Items, and Mailbox Rules

The quickest way to find missing emails is to check local mailbox folders and verify rules that might be moving incoming messages.

Often, missing emails have simply been moved to another folder by accident or by an automated mailbox rule. Checking your built-in recovery folders is the best first step.

Check the Deleted Items Folder

Open Outlook or Outlook on the web and navigate to the 'Deleted Items' folder on the left sidebar to see if the email is there.

Access Recoverable Items

If the email is not in Deleted Items, click on 'Recover items deleted from this folder' at the top of the Deleted Items view.

Review Junk Email

Check the 'Junk Email' folder to ensure the message wasn't incorrectly flagged as spam.

Inspect Mailbox Rules

Go to 'Settings' > 'Mail' > 'Rules' and review active rules to ensure they aren't automatically deleting or moving specific incoming messages.

Check Deleted Items, Recoverable Items, and Mailbox Rules

Retention Policies: Depending on your organization's setup, permanently deleted items usually remain in the Recoverable Items folder for 14 to 30 days.

Solution 2

Run a Message Trace in the Exchange Admin Center

Administrators can track email delivery status across the organization to see if a message was rejected, deferred, or successfully delivered.

Solution 3

Review Audit Logs and Contact Support

If traces show nothing and local folders are empty, reviewing audit logs or escalating to Microsoft support is necessary.

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Frequently Asked Questions

How long are deleted emails kept in Microsoft 365 before they are permanently gone?

By default, items in the 'Deleted Items' folder remain there until the folder is emptied. Once permanently deleted, they move to the 'Recoverable Items' folder, where they are retained for 14 days by default. An administrator can extend this retention period up to 30 days.

Why did my emails suddenly disappear from my Exchange inbox?

Emails can disappear for several reasons, including newly created mailbox rules that move them to other folders, accidental drag-and-drop actions, aggressive archiving policies, or unauthorized access resulting in deletion.

Can I recover Microsoft 365 emails after the retention period expires?

If the retention period in the Recoverable Items folder has expired and no Litigation Hold or In-Place Hold was applied to the mailbox, the emails are permanently purged from the server and generally cannot be recovered.

Who has the permission to run a message trace in Microsoft 365?

Only users with specific administrative roles, such as Exchange Administrator or Global Administrator, have the necessary permissions to access the Exchange admin center and run a message trace.

Migration & Recovery