Check mailbox size powershell

You can use the following PowerShell command to check the size of your mailbox:

Get-MailboxStatistics -Identity <YourMailboxName> | Select-Object -ExpandProperty TotalItemSize

Replace <YourMailboxName> with the actual name of your mailbox.

This command uses the Get-MailboxStatistics cmdlet to retrieve information about the mailbox, and then pipes the output to the Select-Object cmdlet to extract the TotalItemSize property, which represents the total size of the mailbox in bytes.

You can also use the following command to get the mailbox size in a more human-readable format:

Get-MailboxStatistics -Identity <YourMailboxName> | Select-Object -ExpandProperty TotalItemSize | Format-Table -Property TotalItemSize -FormatString "{0:0.##} MB"

This command uses the same Get-MailboxStatistics cmdlet, but pipes the output to the Format-Table cmdlet to format the output as a table with a single column, TotalItemSize, and a custom format string that displays the size in megabytes (MB) with one decimal place.

Note: You need to have the Exchange PowerShell module installed and imported to use these commands. You can import the module by running the following command:

Import-Module -Name Exchange