The LDAP (Lightweight Directory Access Protocol) service is used to share address book lists between FTGate users. By using a shared resource, the users are not looking for the address of each user within their company each time they need to email them. Also, if an address changes, all LDAP users will automatically use the new address.
Benefits of the LDAP server include: less error messages resulting from incorrect email addresses being entered by users, and less time wasted looking for the correct address. This is the biggest benefit, as this could distract more than one user from their given task. The benefits are many, these are just a few...
LDAP stores a record of the users details as defined within the mailbox properties and any added by the administrator along with any additional entries of external recipients details. These can then be accessed using the mail clients LDAP search function.
For more information on LDAP service please see the LDAP section in the Web Admin | Services Chapter of this document.