Exchange Email Notification doesn't clear I have a couple Google Mail (apps and gmail) accounts linked to my phone. If I get email the phone notifies me. If I read the email on a PC, the notification goes away. I like that.

I also am using the "Email" app with an Exchange server for my day job. If I get email the phone notifies me. However, if I read the email on PC (outlook or outlook web access) the notification never clears. So, I see the notification on the phone, tap through and... find nothing new.

Is there a setting that I'm missing? 

[edit] running 2.1, if that matters.

[edit] Feb 1, 2011. This is still an issue since the Android 2.2 update as well
How often is your Exchange email on your phone syncing to the Exchange server? It may not be going away because the sync isn't set soon enough?  My guess is that it doesn't know that the email was marked as read until it syncs back to the server.