Find total number of mailboxes – Exchange Posted by alambert on October 5, 2018 Posted in: Exchange, Powershell, Single. Tagged: count, exchange, mailbox, powershell. Leave a Comment (Get-Mailbox -resultsize unlimited).count Posts navigation ← Disable Read Receipts – Stop read-receipts for an individual mailbox – exchange Mailbox database content index is in a failed state – exchange →