Exchange cmdlets that accept a size value support various unit prefixes such as kilobytes (KB), megabytes (MB), gigabytes (GB) or terabytes (TB). When setting a user’s mailbox quota, for example, the following two cmdlet produce the same result:
Set-Mailbox “user” -ProhibitSendQuota 1024MB -UseDatabaseQuotaDefaults $False
Set-Mailbox “user” -ProhibitSendQuota 1GB -UseDatabaseQuotaDefaults $False
