Hello, we are using Zimbra 8 Network Edition here and we have users on Ipad Iphone and Android

They are all connected threw Active Sync (exchange) And all works well

But the IOS user when they try to add an invite to their appointeent doesn't have the Invitee info.

But if I go exemple on Gmail (exchange) or iCloud it works fine.

What setting can I change in Zimbra to allow user to send Appointement invitee from the their mobile