I have one reminder that I cannot dismiss. A co-worker sent me an email with an attachment but now I keep getting appointment reminders like it thinks I am late in doing something related to the email. I have deleted the email and repeatedly dismissed the reminder but it keeps coming back. I am working on an office server using a Mac OSX, the person who sent the email is also using a Mac on the same network. I am not the IT person who doens't think it is important but it is really annoying. Does anyone have a solution for this issue?