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How to lookup Microsoft 365 storage usage

This article describes how to check the storage usage for a Microsoft 365 tenant.

Storage usage determines the size of your infrastructure and helps Afi plan your onboarding and offer you a custom (discounted) quote.

  1. Log in to the Microsoft 365 admin center and head to Reports → Usage

  2. To estimate the total storage used by a Microsoft 365 tenant, you need to sum up Exchange, OneDrive and Sharepoint storage usage. See the description of how to get the storage usage for each of these services below.

Exchange

To find out Exchange space usage, go to the Reports section of the Microsoft 365 Admin panel and check the Mailbox usage → Storage chart. Please note that user and shared mailbox usage is split into two charts so you will need to look them up separately.

OneDrive

To find out OneDrive space usage, go to the OneDrive usage section and check the Usage → Storage chart.

Sharepoint

To find out Sharepoint space usage (including Group and Team Sites), go to the SharePoint section and check the Site usage → Storage chart.