I have about 20 inboxes, some with the same domain extension. Is it possible to put them in a folder so I can see work related inboxes and personal separated? Also the function to view all emails in allocated folder like the smart folder does for all inboxes.
But the short version is to create a new search folder, give it a name, select the folders you want to include, and that’s it. You don’t need to enter any query as it will include all emails.
I think Search Folders are underrated; they do not even appear in the folder list by default. I only realized after my comment that you might not be able to find them. Sorry.