The IsExternalMailbox element indicates whether the mailbox is external to the organization.
<IsExternalMailbox>true | false</IsExternalMailbox>
Attributes and elements
The following sections describe attributes, child elements, and parent elements.
A text value of true for the IsExternalMailbox element indicates that the mailbox is in an external organization. A value of false indicates that the mailbox is in the organization.
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