Policy
Show Contacts linking controls on all Forms
By default, Tasks, Appointments, Journal Entries, and Contacts hide the controls in the Outlook user interface used for linking related contacts. When you enable this setting, the linking controls appear in Outlook. You might choose to enable this setting if your users rely on contact linking - for example, to track partners who attend appointments together or to track ways in which contacts are related to each other.
c39b8342d2f9 L_ShowContactslinkingcontrolsonallForms Registry
Copy registry mappings
HKCU\software\policies\microsoft\office\16.0\outlook\preferences\showcontactfieldobsolete (enabled) = 1
HKCU\software\policies\microsoft\office\16.0\outlook\preferences\showcontactfieldobsolete (disabled) = 0Policy notes
By default, Tasks, Appointments, Journal Entries, and Contacts hide the controls in the Outlook user interface used for linking related contacts. When you enable this setting, the linking controls appear in Outlook. You might choose to enable this setting if your users rely on contact linking - for example, to track partners who attend appointments together or to track ways in which contacts are related to each other.