[bugvi]

They only difference is that you are using OmniFocus from the App Store and that i am using application "OmniFocus"

Are you running Exchange 2003, 2007 or 2010

When i send an e-mail from my iCloud account it appears in Sent items instantly while a sent Exchange message takes a few seconds (10-20) until it appears. Might the script get a "message not found" as it is not in the sent items when the script runs?

I tried with another - make outgoing mail red - rule and that works fine on Exchange.