Run cscal list to find all of the calendars for the deleted owner’s uid.
cscal -o owner list
Use cscal to remove all the calendars for this owner.
cscal -o owner delete
Verify that all the calendars have been removed by running csuser list again.
Use this procedure if you used commadmin to mark the user as deleted, and the user’s LDAP entry has already been purged.