I have an Office 365 subscription and have Mac 2011 installed. I get the following error message with several of my email accounts. And when the message comes up, I click ok and all is fine for a while, and then the issue repeats itself. My account passwords have been entered correctly. "The server for account "Yahoo" returned the error "Autologout timer; idle for too long." Your username/password or security settings may be incorrect. Would you like to try re-entering your password?" Anyone know how to resolve this? Very frustrating to have this happen several times a day on several of my accounts. Happens on Yahoo, iCloud, and Comcast.