The File Distribution service requires this file to synchronize offline address book files between Exchange servers that have the Mailbox server role and Client Access (CAS) server roles installed.

• 文件分发服务要求此文件与安装了邮箱服务器角色和客户端访问(CAS)服务器角色的Exchange服务器之间的脱机通讯簿文件保持同步。