Messaging Server 5.0, Calendar Server
dn, single-valued
groupOfUniqueNames, icsCalendarResource
Identifies the distinguished name (DN) of the person or group with administrative privileges over the entry.
If the group has Calendar service (is a Calendar group), the owner must be a Calendar user in the same domain as the group. That is, Calendar service must be assigned to the owner as well as the Calendar group.
owner:cn=John Smith,o=Sesta,c=US
2.5.4.32