Use the Get-MailboxStatistics PowerShell CmdLet to retrieve mailbox size, item count, and more from a single or multiple mailboxes.
How to get mailbox size reports using powershell
Find Office 365 Mailbox Size With PowerShell
Mailbox size in Microsoft 365 explained
Get mailbox size of all users in Exchange with PowerShell - ALI TAJRAN
How To Find Mailbox Sizes In Exchange Using PowerShell
Mailbox Size and Quotas in Exchange 2019/2016 and Microsoft 365
Export Microsoft 365 mailbox size report with PowerShell - o365info
Mailbox Size and Quotas in Exchange 2019/2016 and Microsoft 365
How To Find Mailbox Sizes In Exchange Using PowerShell
Office 365 / Exchange Online Mailbox Size Report Including Mailbox Free Space with PowerShell - The Lazy Administrator
Exchange Archives - Page 4 of 11 - Easy365Manager
How to check mailbox size in Microsoft 365
Office 365: Check Mailbox Size using PowerShell - SharePoint Diary
Mailbox Size and Quotas in Exchange 2019/2016 and Microsoft 365
How to get mailbox size reports using powershell