I upgraded my Acer Iconia Tab A500 to the new Ice Cream Sandwich Android 4.0 this morning. I then added my Microsoft Exchange 2010 corporate email account. Now I have two Sent folders (duplicate Sent folder) showing up in my Exchange corporate email account despite the fact that in Outlook, my iPhone, and any other device I use to connect there is only one sent folder. One Sent folder actually has my sent email messages and one is empty. I tried removing the account, rebooting, and then adding it again with the same result. This was not an issue on the old Android 3.2 version prior (I had removed my account during a factory restore for an unrelated issue) and it worked fine with only one Sent folder then. Anybody else have this issue? It seems specific to corporate email on my Microsoft Exchange 2010 account. Hotmail works fine with only one Sent folder.