All cmdlets follow a standard verb-noun naming convention. For example, to get a list of mailboxes you use the Get-Mailbox cmdlet. You can change the configuration of a mailbox using the Set-Mailbox cmdlet. In both examples, the verb (Get or Set) is the action you want to take on the noun (Mailbox). The verb is always separated from the noun using the hyphen (-) character. With the exception of a few Exchange Management Shell cmdlets, the noun is always singular.
Cmdlet names and parameters are not case sensitive. You can use a combination of upper and lowercase letters to improve the readability of your scripts, but it is not required.
Parameter input is either optional or required, depending on the parameter and cmdlet you ...
