Hello all, I am having some problems setting permissions for principals on group calendars and was hoping someone could help me out. I would like to set permissions on groups to groups like so: ./bin/calendarserver_manage_principals -f ./conf/caldavd.plist --add-write-proxy groups:Domain\ Admins groups:Domain\ Users but this fails with: Error: Unable to edit write proxies for "Domain Users" (groups:Domain Users) I can however set permissions on users to groups like so: ./bin/calendarserver_manage_principals -f ./conf/caldavd.plist --add-write-proxy groups:Domain\ Admins users:example_user I am also wondering what the best practice is for creating a group calendar? Would I create it in my calendar client (all oof our users use lightening with Thunderbird) and then export it to a group path on the calendar server (https://calendarserver:8443/calendars/groups/groupname/new_calendar.ics)? Thanks for any feedback! Dennison