There are many nice things to like about x07's Management Shell, but one of the best is pipelining. In short what pipelining does is allow you to feed the results from one cmdlet into another. As you can imagine that increases your capability exponentially. It is called pipelining because you use the pipe (|) symbol to separate the cmdlets.
Let us say, for example, that you want to grant a Full Access perms to the mailbox Bob.Marley for Lenny.Scott:
Get-Mailbox Bob.Marley | Add-MailboxPermission -User 'myDomain\Lenny.Scott' -AccessRights FullAccess
What if you want to give Lenny.Scott Full Access to ALL maillboxes:
Get-Mailbox | Add-MailboxPermission -User 'myDomain\Lenny.Scott' -AccessRights FullAccess
What if you want to give Lenny.Scott Full Access to only the mailboxes in the Sales Database:
Get-MailboxDatabase myX07Server\Sales | Get-Mailbox | Add-MailboxPermission -User 'myDomain\Lenny.Scott' -AccessRights FullAccess
The above example shows how you can pipeline into another pipeline. However, if you really wanted to do this you might use the Add-ADPermission cmdlet:
Get-MailboxDatabase myX07Server\Sales | Add-ADPermission -User 'myDomain\Lenny.Scott' -AccessRights GenericAll
This capability is stunning in its power, which should also be a little terrifying.
Use With Caution...