Calendar Server 6
dn, multivalued
icsCalendarGroup, icsCalendarResource
Identifies the distinguished names (DNs) of co-owners of a group Calendar or Calendar resource. Like the primary owner, the users identified with icsSecondaryowners have administrative privileges over the Calendar group or Calendar resource entry.
The co-owners must be Calendar users in the same domain as the group or resource. That is, Calendar service must be assigned to the co-owners as well as to the Calendar group or resource.
icsSecondaryowners:cn=John Smith,o=Sesta,c=US
1.3.6.1.4.1.42.2.27.9.1.785