We have Exchange 2013 installed on Windows Server 2012. Outlook Anywhere is working but when we use Active Sync on iPhone or Android, we are unable to send any emails.
Exchange Cummulative Updates 1 has been installed.
We get this error on iPhone :
Cannot Send Mail
The message was rejected by the server because it is too large.
The message is almost empty but nothing can be sent.
Do you have any idea what can be the problem ?