How To Get Calendar Item Count Exchange 2013, 2010, 2007

In Exchange 2007, 2010, 2013 you can get the number of items inside the calendar and tasks.

To get this Information we use the Get-MailboxFolderStatistics cmdlet.

Example

To find out the number of Items Inside a Calendar run the following cmdlet:

Get-MailboxFolderStatistics -Identity administrator -FolderScope 'calendar'

To get it for all users

Get-Mailbox |Get-MailboxFolderStatistics -FolderScope  'Calendar' | Select-Object Identity, ItemsInFolderAndSubfolders

To get it for a list of users (use a text file)

Get-Content users.txt | Get-Mailbox |Get-MailboxFolderStatistics -FolderScope 'Calendar' | Select-Object Identity, ItemsInFolderAndSubfolders

Hope this helps!