Exchange email app usage report

The Exchange email app usage report provides details about how many email apps connect to Exchange Online. You can view the version information of Outlook apps that users are using. This information helps you follow up with those users who are using unsupported versions to install supported versions of Outlook.

For general information about usage reports in the Microsoft 365 admin center, and to see a list of all available reports, see Microsoft 365 admin center usage reports overview.

View the email apps report

For information about the roles needed to view usage reports, see "Before you begin" in Microsoft 365 admin center usage reports overview

1. Go to the Microsoft 365 admin center.
2. In the navigation menu, select Reports. If you don't see Reports, select Show all, and then select Reports.
3. Select Usage.
4. On the Usage page, under Reports, select Exchange, and then select the Email app usage tab.

Interpret the Exchange email app usage report

The report displays trends over the last 7, 30, 90, or 180 days. However, if you select a particular day in the report, the table shows data for up to 28 days from the current date, not the date the report generated. The data in each report usually covers up to the last 24 to 48 hours.

The Users chart shows the number of unique users that connected to Exchange Online by using any email app. The Y axis is the total count of unique users that connected to an app on any day of the reporting period. The X axis is the number of unique users that used the app for that reporting period.

The Apps chart shows the number of unique users by app over the selected time period. The Y axis is the total count of unique users who used a specific app during the reporting period. The X axis is the list of apps in your organization.

The Versions chart shows the number of unique users for each version of Outlook in Windows. The Y axis is the total count of unique users using a specific version of Outlook desktop. If the report can't resolve the version number of Outlook, the quantity shows as Undetermined. The X axis is the list of apps in your organization.

You can filter the series you see on the charts by selecting an item in the legend. You might not see all the items in the list in the columns until you add them.

To add or remove columns from the report, select Choose columns.

To export the report data into an Excel .csv file, select Export. This action exports the usage data of all users and enables you to do simple sorting, filtering, and searching for further analysis.

The following table contains definitions of the metrics available in the report.