With Exchange 2019, Microsoft has introduced a new search engine: BigFunnel. This is the same engine that is used in Bing and in Exchange Online. Unfortunately, sometimes, the search results are incomplete. While this might have different reasons, I am just looking at one prticular case here: Incomplete search results are happening on OWA, i.e. this is an issue on the server, not on Outlook (the client) The number of missing emails from the search results is visible in "BigFunnelNotIndexedCount" Read more [...]