Published: July 16, 2012
The MailboxId element specifies an identifier for the mailbox that is accessed by discovery search.
Applies to: Exchange Online | Exchange Server 2013
The text value of the MailboxId element is the mailbox identifier of a mailbox that is accessed for discovery search.
This element was introduced in Exchange Server 2013.
The schema that describes this element is located in the IIS virtual directory that hosts Exchange Web Services.
Can be empty
July 16, 2012