Here is a GUI to get mailboxes information in an Exchange 2010, 2013, 2016, 2019 and/or Exchange Online (O365) environments.
I initially created this GUI just to illustrate how we can use Windows Presentation Foundation (WPF) forms to ease up the execution of PowerShell commands.
- PowerShell v3 (check your version typing $PSVersionTable.PSVersion.Major in your PowerShell console)
- PowerShell command with Exchange tools loaded (can be the Exchange Management Shell, or a simple PowerShell window with a remote Exchange PowerShell session imported)
Complete description and screenshots on my TechNet Blog Post ...