Outlook search – “Something went wrong and your search couldn’t be completed”

前一兩個月開始,公司的電腦 (Windows 10 + Office 365) 在搜尋的時候,常常就會結果不是很正確,然後也會出現這個錯誤訊息 “Something went wrong and your search couldn’t be completed”


上網 Google 一下,看來應該是 Windows search 爛掉了:

Something went wrong and your search couldn’t be completed

Outlook known issues in the June 2017 security updates


目前正在重建 search index 中,希望有解…



[UPDATE] 後來直接安裝 update 包就解了,link 如下:



Windows has released fixes via Windows Updates to address a reliability issue in Windows Search. Below are the relevant KB updates for each version:



[UPDATE] 看來沒解,只好用 workaround 了




Until the Windows Update fix release on 6/27, you can set a registry key that will cause Outlook to stop using the local Windows Search service. When this registry key is set, Outlook will use its own built-in search engine. The built-in search will display the message below to indicate it is not using the Windows Search service.

Outlook Search Warning

Disable Windows Desktop Search Service for Outlook:

NOTE: The following steps show you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Please make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, see this article.

  • Open Registry Editor.
  • Go to: Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Windows Search
  • PreventIndexingOutlook

  • Set DWORD: 1

Detailed Instructions:

  1. Click Start, click Run, type regedit in the Open box, and then click OK.
  2. Locate and then click the following subkey in the registry:
  3. On the Edit menu, point to New, and then click New Key and name the key Windows Search.
  4. Click on the new key Windows Search.
  5. On the Edit menu, point to New, and then click DWORD Value.
  6. Type PreventIndexingOutlook for the name of the DWORD, and then press Enter.
  7. Right-click PreventIndexingOutlook, and then click Modify.
  8. In the Value data box, type 1 to enable the registry entry, and then click OK.
  9. Note to disable the PreventIndexingOutlook setting, type 0 (zero), and then click OK.
  10. Exit Registry Editor, and then restart Outlook.







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