The following registry entry must be set on the client machine (must be set for every computer Link uses, etc) (This is for Outlook 2013, 2016 would use 16.0 I believe is all the difference)
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Preferences]
"DelegateSentItemsStyle"=dword:00000001
this document last modified: January 30 2020 18:16