By default, Calendar Server does not allow double booking for a resource calendar (resource.allow.doublebook parameter). This default prevents scheduling conflicts for resources such as rooms and equipment. However, if you want to allow double booking for a resource calendar, set the csresource -k option to “yes” when you create the calendar.
The following command creates a resource LDAP entry and calendar, but the -k option allows double booking on the calendar, the -o option specifies bkamdar as the owner of the calendar, and the -y option specifies jsmith as another owner:
csresource -m firstname.lastname@example.org -c aud100 -k yes -o bkamdar -y jsmith create Auditorium