"This message has not been downloaded from the server" - Multiple devices all using Exchange Active Sync
We are having this issue across multiple IOS devices ranging from IOS version 5.x up to the latest 6.1.2. Many (not all) emails sent to the devices are unreadable and simply state: "This message has not been downloaded from the server". Microsoft believes this to be some sort of bug with the IOS devices in the way they are handling the SSL encryption.
Facts:
- Devices are connected to an Exchange 2010 SP1 Rollup 6 via Active Sync (No POP3, IMAP or SMTP)
- issue occurs on multiple IOS devices within the organization ranging from IOS 5.x up to the latest 6.1.2
- Issue occurs on both external cellular data and internal wireless networks
- Not all emails sent to the devices result in the error, but issue does tend to occur more frequently from certain senders/domains
- Using the same user account on an android phone does not result in an issue (even when receiving the exactly same email that has been sent to the IOS devices)
- Closing mail app / rebooting device does not resolve the issue
- Doesn't appear to matter what the mesage format is (can be html, plaintext, etc)
- Spent nearly 7 hours with Microsoft going through the Exchange server configuration and looking for possible causes. None have been found and all testing indicates things are setup correctly.
- This is not a case of Issue 2.3 listed here: http://support.microsoft.com/kb/2563324 (verified by Microsoft Support)
- If we disable SSL on the IOS device and connect via plain HTTP the messages are displayed correctly!
- If we use a different SSL certificate, the issue still occurs - so not a problem with the original cert.
Does anyone have any suggestions on what would cause this? Does the ISO devices have any sort of log that would indicate why it's reporting this error? The current error is pretty unhelpful.
iPad (3rd gen) Wi-Fi + Cellular, iOS 6.1.2