Get-MailboxStatistics for all users

Zach Summers 1 Reputation point
2021-11-04T15:53:40.907+00:00

I need to run Get-MailboxStatistics to get the Calendar item count for all users in my domain. I'd prefer to not have to manually type in 150+ names to do this.

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Windows Server PowerShell
Windows Server: A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.PowerShell: A family of Microsoft task automation and configuration management frameworks consisting of a command-line shell and associated scripting language.
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  1. Vasil Michev 95,181 Reputation points MVP
    2021-11-04T16:59:35.58+00:00

    Get-MailboxStatistics does not expose any folder-level details, nor the number of Calendar items. For that, you need Get-MailboxFolderStatistics. Here's a sample: 

    Get-Mailbox -RecipientTypeDetails UserMailbox -ResultSize Unlimited | % { Get-MailboxFolderStatistics $_.UserPrincipalName -FolderScope Calendar | ? {$_.FolderType -eq "Calendar"} | select Identity,ItemsInFolder,FolderSize } | Export-CSV -nti blabla.csv
  2. KyleXu-MSFT 26,206 Reputation points
    2021-11-05T08:29:30.447+00:00

    @Zach Summers

    You could change it into a script: 

    $Mailboxes = Get-Mailbox -RecipientTypeDetails UserMailbox -ResultSize Unlimited  
$data = @()  
  
foreach($mailbox in $mailboxes){  
    $data+=Get-MailboxFolderStatistics $mailbox.UserPrincipalName -FolderScope Calendar| where{$_.FolderType -eq "Calendar"} | select Identity,FolderSize  
}  
$data | Export-Csv C:\Users\demo\Desktop\2.csv -NoTypeInformation

    If you still get an error about it, you could add a delay in this script:
    146812-qa-kyle-16-27-04.png

    Please note: Do not run this script multiple times in a short period of time. Otherwise you will be restricted by Exchange online.

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