You use UM mailbox policies to set UM settings for UM-enabled users, such as personal identification number (PIN) policies and dialing restrictions.是什么意思_You use UM mailbox policies to set UM settings for UM-enabled users, such as personal identification number (PIN) policies and dialing restrictions.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句