Just a short note to hopefully help others:
If you are creating a “Search Folder” in Outlook, and are using custom criteria, and one of them is “In Folder” with the condition “Does not Contain”, you must list all your keywords in a single criterion.
For example, I have a Search Folder called “Weekly Threads” to help me review the email activity from the week when writing my weekly report.
On the advanced tab, you can add the filter expressions you want. I don’t want to see anything from my Junk or Deleted Items folders, and I was struggling to get my Search Folder to work.
I stumbled across this article, which describes how to use Search Folders, within which was a description on how the author of that article filtered out mail from multiple folders.
Until now, I hadn’t been able to get it to work, and resorted to filtering out by sender. Now, I have the answer! You must put all the folder search terms into one, single search criterion for the filter to work.
I find it strange, or at best non-intuitive that you while you can use multiple criteria for things like “From”, you must use only one criterion for the “In Folder” field. But, it works, so on to the next thing!