After syncing the carddav server via mobile devices e.g. mobile phones it is possible to get contacts without having a valid email address (just phone number and name).
These data sets are not found during search!
It is also possible to save these contacts without having a valid e-mail address after editing it (name, surname, firstname and phone number). This is not possible with contacts in local addressbooks: error: missing e-mail address
After syncing the carddav server via mobile devices e.g. mobile phones it is possible to get contacts without having a valid email address (just phone number and name).
These data sets are not found during search!
It is also possible to save these contacts without having a valid e-mail address after editing it (name, surname, firstname and phone number). This is not possible with contacts in local addressbooks: error: missing e-mail address