The PR_MAILBOX_OWNER_ENTRYID property contains the address book entry identifier for the owner of a mailbox.
| Header file: | EDKMDB.H | 
| Applies to: | Mailbox objects (information store objects) | 
| Identifier: | 0x661b | 
| Property type: | PT_BINARY | 
| Access: | Read-only | 
The PR_MAILBOX_OWNER_ENTRYID property is not defined for gateway mailboxes.