If you want to enable the Appointment type pull-down in the Appointment screen, you have to change the multisites flag in the properties file to multisites=on.
Once you restart tomcat, all your existing appointments will disappear!
That’s because the old appointments have no locations. Don’t ask me why the multi-sites feature is related to appointment types.
You need to add a Site in the Admin, Misc, Satellite-sites Admin.
Once you have a site setup, you need to update all the appointment records that have no location.
UPDATE APPOINTMENT SET LOCATION = 'SiteName' WHERE LOCATION = '' ;
SiteName should be one of the sites you created.