To import and authenticate TYPO3 users from an LDAP directory,I wrote the TYPO3 extension "ldap" geschrieben. Version 3.x is compatible with TYPO3 v6, v7 and v8. Currently I am working on a version compatible with TYPO3 v9 LTS. You can already test this new version.
Evaluate ldap 3.x
Version 3.x is a complete rewrite based on "Extbase" und "Fluid" and is compatible with PHP 7.
TYPO3 scheduler helps to automate recurring tasks like deactivating users which have been deleted from the LDAP directory.
Since roughly three years ldap 3.x is used by European companies, universities and public organisations.
The new backend module enables import and update of users, provides testing functionality and offers diagnostic information.
LDAP servers and configurations are stored in a standard text file, simplifying versioning and staging.
Even large numbers of users are imported reliably. Thanks to the integration of the "Developer Log" extension, configuration problems can be analyzed easily.
In the past I received many requests for features, support, etc. but only a very small number of companies were willing to contribute code or mones to the extension's development. Therefore I will provide version 3.x only to companies which contribute financially (aka. "pay").