Search in outlook 2016 shared mailbox is not working

That article only references Outlook 2010 and 2013.  I dont see anything related to 2016 in there.

We are experiencing the same issues.  

When we add a shared account under its own profile and a user logs into it with their user account, any searches only bring back results from their personal mailbox, not the shared mailbox they are logged into

When we add shared accounts with a users Mail Profile so they appear below the User's Mailbox, you dont get any results from the shared mailboxes when searching all mailboxes.  The only way it works in this setup is to go to the actual mailbox and search from there.

We have several departments that use the shared account setup as its own mail profile option as when you respond to emails in that mailbox, the replies that people get are from that mailbox, not the individual user that is replying to them.  If you reply to emails from a shared account mapped from within a users personal mail profile, all replies come from that user instead of from the shared account.  Our departments need to be able to use the shared mailboxes setup as their own profile for that reason.   

I see this has been an on-going issue for a good while (years) with Outlook 2016.  Why hasnt something been done about it?  Just telling users to change the way they do things completely is not a good answer.  Would really like to know what is being done about this.