This article only applies to Exchange 2010/2013/2016 accounts with POP/IMAP service enabled.
Read the Knowledge Base articles on POP/IMAP email
 for more information about POP/IMAP service

If you would like to be able to perform Global Address List (GAL) lookups in a mail client that is configured for your POP/IMAP mailbox, you will need to configure the Address Book to connect to the LDAP server. This article provides LDAP setup instructions for Microsoft Outlook 2010/2013/2016. These instructions can also be applied to any widely-used mail client, following the same basic steps.

  1. In Outlook, go to File > Account Settings > Account Settings. Switch to Address Books.
  2. Click New.
  3. Select Internet Directory Service (LDAP) and click Next.
  4. Specify the below settings:
    • LDAP server name:
    • Username: only Distinguished Names (DNs) are supported. 
      E.g: CN=mailbox@AccountName,OU=AccountName,OU=hosting,DC=exchXXX,DC=XXX,DC=XXX
      Note: To find out the correct value for the Distinguished Name, navigate to HostPilot > Home > Exchange servers and settings > Setup email client > Outlook for Mac.
  5. Password: regular end-user password for the mailbox
    LDAP settings
  6. Select the This server requires me to log on box and type in the email address and the mailbox password.
  7. Click More Settings. Under Connection, select the Use Secure Sockets Layer (SSL) box and change the port number to 636.
    Connection settings
  8. Open the Search tab. Under Search Base, choose Custom and put in the Search Base setting. 

    Search settings
    To find out the correct Search Base setting, navigate to HostPilot > Home > Exchange servers and settings > Setup email client > Outlook for Mac.
    The settings looks like OU=AccountName,OU=hosting,DC=exchXXX,DC=XXX,DC=XXX
  9. Click OK > Next > Finish.
  10. Restart Outlook.