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Check the Size of an Exchange Mailbox and Find Exchange Online Limits

< 1 minute read

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Checking the size of a user’s Office 365 mailbox is easy, but the path in the Exchange admin center may not be intuitive for you.

The video above provides these steps:

  1. From the Exchange admin center, click mailboxes under recipients.
  2. Select the user whose mailbox size you want to check.
  3. Click the edit icon (looks like a pencil).
  4. Select mailbox usage.

If you’d like to check Exchange Online storage limits, whether you’re an admin or an end user, you can view this TechNet page on Exchange Online. You’ll find mailbox storage limits across all Office 365 plans, from Business Essentials to Enterprise E4 and everything in between.

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