Using classic Outlook for Windows in business environments
Hello Earthborn
I'm Diane, an Office Apps & Services MVP specializing in Outlook, and I’m happy to help you today.
That means if you create a search folder, it won't find messages already downloaded. If you don't create search folders, check the option to not show it again.
If you change your mind, you can restore the dialog - instructions are here - https://www.slipstick.com/outlook/show-dialogs-... - that option is 59