You have an Exchange Server 2013 organization.
You create a public folder.
You assign an email address to the public folder.
You need to ensure that only a user named User1 can add content to the public folder by using email.
Which cmdlet should you run?

A.
Set-MailPublicFolder

B.
Set-PublicFolder

C.
Set-Mailbox

D.
Add-PublicFolderCMentPermission

Explanation:
Set-MailPublicFolder
This cmdlet is available in on-premises Exchange Server 2013 and in the cloud-based service.
Use the Set-MailPublicFolder cmdlet to configure the mail-related settings of mail-enabled public folders. If you
want to configure basic settings that aren’t mail related, use the Set-PublicFolder cmdlet.
EXAMPLE 1
Set-MailPublicFolder -Identity MyPublicFolder@contoso.com -AcceptMessagesOnlyFrom “User1”
EXAMPLE 2
This example sets the primary SMTP address of the mail-enabled public folder MyPublicFolder@contoso.com
to MyPublicFolder@fabrikam.com.
Set-MailPublicFolder -Identity MyPublicFolder@contoso.com -PrimarySmtpAddress
MyPublicFolder@fabrikam.com

http://technet.microsoft.com/en-us/library/aa997560(v=exchg.150).aspx
http://technet.microsoft.com/en-us/library/bb123707(v=exchg.150).aspx
http://technet.microsoft.com/en-gb/library/bb397214(v=exchg.150).aspx