Moved (2003 to 2010) Users are getting” Receiving Reported error (0x800CCC0F)” while downloading emails using POP3: "- 已使用 Google 工具列寄出"
it's a BUG is exchange 2010 and expected to solve in RU2. meantime I was trying for any workaround by editing the AD attributes of the moved user and solve the issue.