Files that contain the .ldif file extension are most commonly associated with LDAP directories. LDAP is an acronym for Lightweight Directory Access Protocol. LDAP is an Internet protocol that allows email programs and other applications to look up information on a specified server.
The LDIF files that are used by these LDAP directories are used to describe a specific directory and the entries that are contained within that directory. The LDIF file also stores any changes that have been made to the directory entries.
The popular Mozilla Thunderbird email application also uses the .ldif file suffix. These LDIF files contain the address book contact information for a user of the Thunderbird email program.
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