exchange published calendars

[Shocker]

Hi everyone

 

was hoping for a bit of help with this one please, i have published a calendar online and then shared this out with the ics link to iPhones and everything seems to be working i can also view this calendar on the outlook clients which is great but the rights that are set as default is read only is there anyway that i can change this to allow the users to edit the calendar especially on the iPhones. When i try to change the publishing details to Editor i get an error saying "The policy doesn't allow anonymous sharing with Editor" but i am not sure were this policy is stored? I am running and exchange 2013 server with CU7 installed (going to install CU8 tonight) any help would be great appreciated.

[sukh]

Check exch org sharing policy.