We currently have 3 Exchange 2007 servers and 1 Exchange 2010 acting as a link between us and Office 365.
The Exchange 2007 and Exchange 2010 servers are both on-premise.
We've now installed an Exchange 2013 server on-premise and we've migrated a few test mailboxes over to it.
Outlook and the Outlook Web App work OK, however any iOS device we setup the accounts on do not.
The accounts add on the devices OK and autodiscover works OK. However when we go into the account in the in-build mail app on the devices it shows no mail at all. We are unable to send from them either. The email just sit in the Outbox.
In the past it just worked without additional setup on the Exchange servers, are we missing something?