[xwiki-users] LDAP subscription

Hello, I'm volunteering as a technician and hoster for the design-platform.org collaborative project. We are seriously considering using to the XEM platform, in particular for its internalization and multi-wiki support, and its nice WYSIWYG editor. A major feature we are looking for is LDAP support; however, I didn't find any information about LDAP subscription. The objective is to create LDAP accounts for all subscriptions on the wiki, and completely avoid XWiki-only subscriptions. Is this feature already available? If yes, do you have any pointers to documentation and/or source code? If not, do you have any thoughts on an efficient way to alter XE to enable it? Thank you in advance, -- Geoffroy Carrier