Outlook
has a nice feature called "Contact Linking" that allows you to link a
contact with any appointment, task, other contacts, or even email. Adding this
link is done with a button on the bottom of the appointment details.
In the
new versions of Outlook (2013, 2016) this button is hidden by default, to
reactivate it you have to change/add an entry in the registry, which are
described here:
Outlook 2016:
HKEY_CURRENT_USER\Software\Microsoft\office\16.0\outlook\preferences
DWORD: showcontactfieldobsolete
Value = 1
Outlook 2013:
HKEY_CURRENT_USER\Software\Microsoft\office\15.0\outlook\preferences
DWORD: showcontactfieldobsolete
Value = 1
Find more details on this eg. on this page:
https://www.slipstick.com/outlook/contacts/show-contact-linking-fields/
