Is it possible to get additional fields from AD, such as position, department and save them to the user's profile?
Topic on Extension talk:LDAPUserInfo
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One can actually fetch additonal data and map them to user preferences. Unfortunately there may be no fields for position and department in the default MediaWiki user preferences.
See "properties.gender": "gender"
part in the example. this will set the MediaWiki user preference "gender" to the value of the "gender" attribute contained in the LDAP user info.