Average storage use per Microsoft 365 account

Sign in to the Microsoft 365 admin center with your admin account.

You must be a global administrator in Microsoft 365 or an Exchange, SharePoint, OneDrive for Business administrator, or reports reader to see the Microsoft 365 reports.

In the main menu, go to Reports › Usage.

On the Usage page, in the Product Reports group:

• Select Exchange, and then go to the Mailbox usage tab.

  In the Storage chart, select the rightmost point .

  This will show you the total amount of storage used by the Exchange account mailboxes in your organization. (See details about the Exchange mailbox usage reports.)

  

• Select OneDrive, and then go to the Usage tab.

  In the Storage chart, select the rightmost point.

  This will show you the total amount of the OneDrive storage used by all user accounts in your organization. (See details about the OneDrive usage reports.)

  

• Select SharePoint, and then go to the Site usage tab.

  In the Storage chart, select the rightmost point.

  This will show you the total amount of storage used by the SharePoint account sites in your organization. (See details about the SharePoint site usage reports.)

  

Calculate the average storage use per account as follows:

\[ \frac{\text{Exchange mailbox usage} + \text{OneDrive usage} + \text{SharePoint site usage}}{\text{Total number of user accounts in your organization}} \]