Thread:Project:Support desk/PHP Notice: Undefined offset: 0 in /srv/www/vhosts/wiki/extensions/LdapAuthentication.php on line 1208/reply (3)

The extension is available from Extension:LDAP Authentication. Just follow the download link in the box in the top right corner.

I don't know, if you have to change some settings. Just update and try out. Maybe the extension has a Readme or a ChangeLog coming with it. Read them to see, if there are changes you need to do! :-)

Btw: I just noticed that your MediaWiki version is really old. The extension LDAP Authentication only supports MediaWiki 1.19 and newer. So if you only update the extension and not also MediaWiki, I would not guarantee that it is actually working correctly. :-(