I have an odd one here for sure.
I am an exchange administrator for a organization and we believe that since getting iPhone 6's two of my execs have had an issue where their iphone AND their ipad have issues. It is reported that a reply to all will cc themselves on every email and we found that when looking at the mail account settings the username actually changes from username@primarysmtp.com to username@internaldomain.com.
We see this on both of the devices (iphone and ipad) and we feel that it began when they two execs got their iPhone 6's.
I will also add that we do not have any way for these devices to communicate with our internal network other than just ActiveSync. There is no internal wifi network or anything like that. We have updated the device to the latest version of iOS and we just migrated their mailboxes to Exchange 2013. I will add that this happened on 2010 as well and the migration just happened to be occurring during the time that we were trying to resolve it. It has been going on for quite a while, but is starting to make a scene internally.
We have since found that some of our regular users have this issue as well, but no one in our IT staff has seen this. I am an Android user, but the rest of my staff are iOS users.
Anyone seen this before? Any ideas? How could this just flip the account settings like this?