I am having a problem with iPhones 5 connection to Exchange.
We are running Exchange 2010 and with about 20 users with iPhones (4&5). All working fine.
Last week two directors went abroad but email not working (through 3G or WiFi). Message said something like "connection to server fail". Their phones were working before they left UK.
I checked with other users and their phones (email) were working fine.
When the two directors came back to UK their phones (email) still don't work. So it must be their phones that had lost connection to Exchange server.
They haven't changed their password and I don't think they have change any settings. So why did it loss connection to the Server? I know how to reconfigure it but they want to know why it lost connection in first place. Is this a common thing that iPhone5 loss exchange connection?
Thanks in advance.