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Understanding the Received Metric in Microsoft 365 Email Activity Reports

Chanuka Geekiyanage Oct 12, 2026 868 views

Question details

The user wants to understand the scope of the Received metric in the Microsoft 365 Email Activity report, specifically whether it includes internal or external emails.

What Does the "Received" Metric Mean in the Microsoft 365 Email Activity Report?

Product: Microsoft 365
Device & OS: not provided
Scenario: Reviewing organizational email usage and metrics within the Microsoft 365 admin center.
Observed behavior: The user needs clarification on what email data is aggregated in the Received count to accurately interpret administrative reports.

Before you start

Ensure you have the necessary administrator permissions in Microsoft 365 to access the Usage Reports section within the admin center.

Solution 1Recommended

Interpreting the Received Metric in Microsoft 365

Understand exactly what the Received metric counts to accurately analyze your organization's inbound email traffic.

In the Microsoft 365 Email Activity report, the 'Received' metric provides a comprehensive view of inbound email traffic. It is designed to capture the total volume of emails coming into users' mailboxes.

This metric aggregates all incoming communication. It includes all email received by the organization, meaning it encompasses messages from both internal users (colleagues within your tenant) and external senders (people outside your organization).

Access the Admin Center

Navigate to Reports

On the left-hand navigation menu, click on 'Reports' and then select 'Usage'.

View Email Activity

Select 'Exchange' from the list of available services, then click on 'Email activity' to load the usage graphs and metrics.

Analyze the Received Count

Locate the 'Received' column in the detailed data table. Note that this number reflects the sum of both internal and external emails delivered to the respective user.

Interpreting the Received Metric in Microsoft 365

Microsoft Documentation Reference: According to official Microsoft documentation, the Received metric strictly encompasses all inbound emails, regardless of whether the sender's origin is inside or outside your organization.

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Frequently Asked Questions

Can I filter the Microsoft 365 Email Activity report to show only external received emails?

By default, the main Email Activity report aggregates both internal and external received emails into a single metric. To view specific external mail traffic, you will need to utilize the Microsoft 365 message trace tool or custom mail flow reports in the Exchange admin center.

Does the Received metric include emails blocked by spam filters?

Generally, the Email Activity report tracks emails that successfully reach the user's mailbox or junk folder. Messages that are completely rejected or blocked by Exchange Online Protection (EOP) prior to delivery are tracked separately in the security and threat protection reports.

How long is the email activity data retained in Microsoft 365 reports?

Microsoft 365 usage reports, including the Email Activity report, allow administrators to view data trends over 7, 30, 90, or 180-day periods depending on the filter selected in the admin dashboard.

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