This article describes how to check the storage usage for Office 365 domain.
Storage usage determines the size of your infrastructure and helps Afi plan your on-boarding and offer you a custom (discounted) quote.
1. Log in Office 365 administrator panel and head to Reports -> Usage
2. To estimate the total storage used by the Office 365 domain you need to sum up Exchange, OneDrive and Sharepoint space usage. See description how to get storage usage for each of these services below.
To find out Exchange space usage, go to https://admin.microsoft.com/Adminportal/Home?#/reportsUsage/MailboxUsage and then select Storage tab in the report chart.
To find out OneDrive space usage, go to https://admin.microsoft.com/Adminportal/Home?#/reportsUsage/OneDriveSiteUsage and check the Storage tab chart.
To find out Sharepoint sites space usage (including Group and Teams Sites), go to https://admin.microsoft.com/Adminportal/Home?#/reportsUsage/SharePointSiteUsageV1 and check the Storage tab chart.