Ldap extid Option

Introduced in release: 8.0.2

The  base option names a user LDAP attribute which contains an external display identifier for the user for use with the Cassandra Message Store. The external display identifier must be unique within the user&#x27;s domain. IMAP shared folders and Access Control Lists (ACLs) are internally stored using the identifier from the ldap_permid attribute, but when shared folder owner names or ACLs are changed or sent over IMAP, the external display identifier is used. If the external display identifier does not contain &#x27;@&#x27;, then the domain name will be added for domains other than the default domain.

The Cassandra Message Store caches a copy of the value of this attribute in the &#x27;userid&#x27; column of the user table in the ms_mbox meta data keyspace. To refresh the stored value, TBD.

The default value for the  base option is the value of the   MTA option and that option defaults to &#x27;uid&#x27;.

See also:
 * ldap_uid MTA Option
 * ldap_permid Option