Microsoft Exchange Shared Mailbox Schema Attributes
The following attributes are the only supported schema attributes for the Shared Mailbox object and User schema attribute (memberOfSharedMailbox).
Shared Mailbox Object Schema Attributes
In addition to the existing object attributes (samAccountName, ObjectGUID, ObjectSID, distinguishedName, homeMDB, mailNickName), the following schema attributes must be added manually if required:
fullAccess
Multi-valued attribute representing Active Directory objects having Full Access permission on Shared mailbox. Object’s name is represented in msDs-PrincipalName format.
sendAs
Multi-valued attribute representing Active Directory objects having Send As permission on Shared mailbox. Object’s name is represented in msDs-PrincipalName format.
sendOnBehalf
Multi-valued attribute representing Active Directory objects having Send As permission on Shared mailbox. Object’s name is represented in distinguishedName format.
User Schema Attribute
memberOfSharedMailbox
List of Shared Mailbox names that the user has Full Access, Send As, Send On Behalf, or all three permissions.