Hello, I'm sorry because I'm most probably asking a question that has been answered somewhere, but searching haven't helped me a lot and "ispconfig_3_1_manual" does not cover this. It is about well know intimidating warning: WARNING: Do not edit or modify any user settings here. Use the Client- and Reseller settings in the Client module instead. Modifying or changing users or groups here may cause data loss! I've even come to the related issue (#4980), but nowhere have I found conclusive: - what kind of "User management" is safe under the "User management" -> "CP users", - is it safe to add other admin user (not client) - is it safe to modify other admin user (not client) - to change any of the available options (password, available modules., type, active...) - is it safe to modify group membership / default group here - Modifying or changing what kind of users or groups may cause of (what kind of) data loss - Are the possible damage (data loss) done here contained to what is reversible by restoring mysqldump and /etc dir backup? Thanks for any clue in advanced.