Recently we started loading thumbnail photos into AD for use with outlook, lync, sharepoint,etc... While our users are enjoying this feature there are some that have concerns of their pictures being sent to email addresses outside our organization. My question is if there is a way to prevent these thumbnail photos from being sent to internet users and only allow to be seen internally. I'm not sure if this is an outlook option or an option that can be set on exchange. Any assistance would be appreciated.