This has recently started happening, IT updated my Outlook while I was on vacation. When I drag and drop an email from my inbox to an Archive folder the email is now copied instead of just moved. Is there a way to stop this from happening? I am moving the message because I don't need it in the inbox and now have to go back and delete the original message. Seems like a useless extra step.

So is there a setting to turn this copying off? Thanks.