After upgrade, you will have to delete the MDM profile from the iOS device and reprovision the iPhone against the 11.0 server to get them to show in the System tree in ePO. Detailed steps are provided in the EMM 11 User guide.
I did this. I already found the error in the event viewer.. McAfee Support is also try helping me..
The error was a ??.phone.to.eposender?? something like this.. i already reset to a older snapshot so that i can work..
I was wondering if you got the problem resolved? Can you share the exact log message in the event viewer if you are still having the issue?