We support some companies in one server and have organization(O=) for each companies.
And we make sub-directory for each companies(copy from main directory) and define in directory assistant in order to choose easily user's company persons/groups in address picker dialog.
But Domino don't allow same user/groups in directories defined DA(include main directory), and request that users in DA should be unique.
Then if we have same user document in main directory and sub-directory, address lookup is failed and missing alt-username from sender address.
Please provide sub-directories definition option in DA for only address pickup use, and don't lookup users in order to search address in these sub-directories.
I know notes.ini parameter in order to lookup only main directory, but this INI prohibit lookup all sub-directories and we can't search users in sub-directories via iNotes u-lite mode access.
This function will present us to select our company users only quickly in address picker dialog.