I installed ATA today. And after the first field where to enter my notification address i thought ok. Maybe most people want to use an "outdoor" email box for this.
But then i wanted to "share" an entry with a colleague of mine. And there is also no "people picker".
As i found no uservoice channel for ATA, i thought this community would be the right place to post.
CAn you please send an email to AskCESec [at] microsoft [dot] com. we can log this as a feature request. but we need some info about your deployment. We are working on a user voice channel too.