By changing the Access Options Client Settings 'Find/Replace Default' from 'Fast Search' to 'General Search', the value 'Search in:' in the search box is automatically set from 'Current field' to 'Current document'.
To set the default setting of the search function to 'Current field'/'Part of the field content', I recommend setting the registry entry '\HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Access\Settings\Default Find/Replace Behavior' to 4.
For clients that do not have a complete Access installation on their computer, this value must be created again.
Marco Bracher