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A recent addition of functionality to this module duplicated functionality in the ldapprov module. This functionality provided a configuration option for whether user records should be deleted from LDAP when deleted from Drupal. Unfortunately, the ldapprov module provides this functionality via hook_user() and is non-configurable. Because of this, the functionality was removed from this module as it duplicated functionality and had a meaningless configuration option.
This release of the Crowd module provides tighter integration with LDAP (via the LDAP Integration and LDAP Provisioning modules) so that LDAP attributes and groups are updated upon authentication.