We had issues sending and receiving attachments in ActiveSync due to the settings in the web.config file. The default was set to 10MB. We use Exchange 2010 SP3. I adjusted the values in the web.config file to accommodate up to 30MB which is our Global limit in Exchange, but it seems attachments larger that 22 MB continue to fail.
I then adjusted our Global limit to 35 MB and changed the settings in the web.config file to accommodate the same size, but it still fails with any attachment(s) totaling 22 MB or more. Is this some kind of limitation with the ActiveSync protocol or is there a setting I am missing?