Just seeing if anyone else is seeing this behavior as well...
The issue seems to be lack of "syncing" between ActiveSync devices. My inbox in SM web interface shows about 30 emails in the inbox, Outlook shows 2, my iPad shows 5 emails (that dont even exist in the SM web interface inbox or Outlook) and my iPhone shows 8 emails (2 exist in the SM web interface and 3 exist on the iPad the rest are over 3 weeks old).
Even though all the devices are running ActiveSync, they dont seem to be in sync at all. Have numerous (50+) customers reporting this behavior as well. Some are Outlook, some use only a mobile device, others use a mix of all the above, it is random.
The latest client that moved to us said this only started when he migrated from Office365 to us, is constantly reminding us this never happened with Office365.