[xwiki-users] administering users in a XWiki Farm

Hi, xwikiers! I am sure I am missing some clear point, but I am not able to find documentation on how administer users in a XWiki Farm. My basic concern relates with global users being included in virtual wikis' groups. I've reached this document... http://manager.xwiki.org/xwiki/bin/view/AdminGuide/ Could it be welcome a link to User and Group Management there and to complete this document to include management in a xwiki farm? Am I missing anything obvious? Thanks for your help! Ricardo -- Ricardo Rodríguez CTO eBioTIC. Life Sciences, Data Modeling and Information Management Systems