The search criteria are not supported by FAST search.The search scope is set to All Outlook Items, Subfolders, or All Mailboxes.You are searching a secondary mailbox (there's an exception to this exception, as explained later).Outlook assesses the performance of the network connection and determines there is latency.The FAST search query results are not returned in a timely manner (about 5 seconds).The FAST search feature is disabled via policy or local user registry setting (more on administering the feature below).Outlook is connected to the mailbox in online mode.You are connected to a mailbox on Exchange Server 2013 or earlier.To recap, Outlook uses FAST search and/or returns results using FAST, except if any one of the following conditions are true: To use FAST search for a similar query, you would need to submit the following criteria: received>. Therefore, if you submit received:this year, Outlook automatically displays WDS search results. For example, Outlook supports the use of natural language queries, such as received:this year. The search scope is set next to the Search text box, as shown here:Īdditionally, if you type search criteria that is not supported by FAST, Outlook returns WDS results (of course, assuming WDS supports the criteria). If you set the scope to All Outlook Items, Subfolders, or All Mailboxes Outlook defaults to WDS results. Note Outlook also assesses the performance of the network connection and if it determines there is latency, it may default to displaying WDS search results.īut wait, there's more! Some search scopes set search criteria that cannot be processed by FAST.
But, if the FAST Search timeout is reached before a server response, then a message indicating that We're having trouble fetching results from the server., along with the link " Let's look on your computer instead." If you click this link, then WDS search results are displayed. and they query Exchange 2016 and Exchange Online* using FAST Search.Īssuming FAST Search is not disabled by policy, Outlook initially submits a query to Exchange Online using FAST Search.* If FAST Search results are returned in a timely manner (about 5 seconds), these are displayed. In Cached Exchange Mode, Outlook 2016, Outlook 2019 and Outlook for Office 365 still query WDS desktop search indexes. Search in Outlook 2016 and later versions Why am I still talking about WDS? Because it is still relevant, even when using the latest and greatest versions of Outlook and Exchange. WDS does not index the mailbox store directly. It is this local file that is indexed by WDS. When an Exchange email account is in Cached Exchange Mode, the mailbox contents are synchronized to the local. Let us focus strictly on searching Exchange mailbox content. Exchange content is indexed by WDS when Outlook is configured to connect to the Exchange mailbox using Cached Exchange Mode. The use of WDS in Outlook is sometimes referred to as Instant Search. At the same time, Outlook uses the same WDS architecture to search these local indexes when you initiate a search. These indexes are created on the local disk.
CONNECT OUTLOOK TO EXCHANGE SERVER INTERMEDIA OFFLINE
For more information about the migration of Exchange Online search features to Microsoft Search, see How Outlook for Windows connected to Exchange Online utilizes Microsoft Search.Īs far back as in Outlook 2007, Outlook has utilized Windows Desktop Search (WDS) to index Outlook Data (.pst) and Offline Outlook Data (.ost) files. However, on-premises Exchange Server will continue to use FAST search.
* Note Exchange Online on Microsoft 365 is migrating search features from FAST to Microsoft Search. The new feature set is readily available when using Outlook on the Web to connect to a mailbox on Exchange Server 2016 or Exchange Online.* Additionally, the newer Outlook 2016 desktop client also takes advantage of the new FAST search when connecting to these same mailboxes. These suggestions are dynamically computed based on your previous searches and the names of people that you frequently communicate with. With FAST search, various new features are made available to Exchange 2016 mailbox users, including Search suggestions and People suggestions.
With Microsoft Exchange Server 2016, the FAST search architecture is introduced to Exchange. The term FAST Search may not be entirely new to you if you managed SharePoint sites anytime during the last decade.
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