This attribute is used by Microsoft® Exchange Server and is not necessary for Active Directory functioning. It specifies the trees of address book containers to appear in the MAPI address book. Similar to addressBookRoots, it differs by being a linked attribute.

cn: Address-Book-Roots2
ldapDisplayName: addressBookRoots2
attributeId: 1.2.840.113556.1.4.2046
attributeSyntax: 2.5.5.1
linkID: 2122
omSyntax: 127
omObjectClass: 1.3.12.2.1011.28.0.714
isSingleValued: FALSE
schemaIdGuid: 508ca374-a511-4e4e-9f4f-856f61a6b7e4
systemOnly: FALSE
searchFlags: 0
systemFlags: FLAG_SCHEMA_BASE_OBJECT
schemaFlagsEx: FLAG_ATTR_IS_CRITICAL

Version-Specific Behavior: Implemented on Windows Server® 2008 operating system and Windows Server® 2008 R2 operating system.