Because the company's number is more, then the user name is more natural, there are many users send mail do not know the other party's e-mail address and other information, what method can be queried, we also know that Outlook can create communications thin, so that the daily contact can be added to the communication book, Then you can choose to open the recipient directly when you send the message, but we need one to manually enter and not confirm the contact's real address, which brings a lot of problems, but we can configure the LDAP query in Outlook and verify it through a valid mailbox account password. See below specifically:
1. Open Outlook, click File
2. Information-Account Settings-Add and remove accounts or change existing connection settings
3. Switch to Tags-communications bo-New communications book
4. Select Internet Directory Service (LDAP)