I am running Windows 10 Pro 64 bit version 10.0.16299, Office 365 version 1712 (Build 8827.2148), and in Outlook itself it reports version 2016 MSO (16.0.8827.2131) 32 bit. Sometime between Monday Jan 22 and Wednesday Jan 24, 2018 the search function in
Outlook mail became "broken", returning no results. I stopped and restarted the search service, and re-indexed the search in Indexing. The desktop search of files on the computer is working just fine, but when I put in any search item in Outlook
Mail program it returns nothing, (showing the default message to "find more on the server", but I only have my mail stored here locally for the most part). Search does seem to be working for searching in the Calendar, (if I put in a client's name,
all their appointments show up), so it is just not searching the mail folders on the computer apparently. I am using a gmail mail address only, with .PST files for each year. Up until a day or so ago, if I entered a client's name, all their emails, going back
many years, showed up instantly as it searched through all those PST files. Now, nothing shows up at all. I have also done a repair of the PST files using Scanpst.exe.
I have another computer, my laptop, and the same issue is present in Outlook too (though it's version of Office is the same, the Outlook version is 16.0.8827.2131).
Again, the desktop search for documents/files is working. But there is something seriously wrong with Outlook search. I also reinstalled Outlook just before I wrote this note, with a full "Online Repair". I know/remember it has been broken before
by updates, did this happen again? Anybody else having this same issue?