How can I get the size of folders in an exchange 365 mailbox?

Administrator 0 Reputation points
2023-05-10T09:17:27.42+00:00

A post box has grown about 50 GB in a year and I want to find out how is this possible. For this, I want to get the sizes of all folders. How can I accomplish this?

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  1. Vasil Michev 119.6K Reputation points MVP Volunteer Moderator
    2023-05-10T16:36:45.1066667+00:00

    If you have access to the mailbox, both Outlook and OWA will readily show you this info. In Outlook, right-click on the root folder > Data file properties > Folder size > Server data. In OWA, go to Settings > General > Storage (or directly https://outlook.office.com/mail/options/general/storage)

    As an admin, you can also get the same data via PowerShell:

    Get-MailboxFolderStatistics ******@domain.com | select Name,Folder*Size,Items*

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