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herylupi's avatar
herylupi
Copper Contributor
Nov 25, 2025

Microsoft Outlook (classic) search suddenly not working

Hi, many users in my company experienced same issue today, when trying to search anything/any word but get no results and same symptom (We're having trouble fetching results from the server). The app...
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Surya_Narayana's avatar
Surya_Narayana
MCT
Nov 28, 2025

hi herylupi​ Pl check below workarounds options one after one.

  1. Disable Server-Assisted Search (temporary workaround)
    • File → Options → Search
    • Uncheck “Improve search speed by limiting the number of results shown”
    • Restart Outlook
  2. Try web / New Outlook
    • Use Outlook Web (OWA) or New Outlook – search usually works there
  3. Check M365 Service Health
    • Look for issues under:
      • Exchange Online
      • Microsoft 365 Search
  4. Rebuild Index (if needed)
    • Control Panel → Indexing Options → Advanced → Rebuild
  5. Switch Outlook to use Windows Index (Registry)

HKCU\Software\Microsoft\Office\16.0\Outlook\Search

DWORD: DisableServerAssistedSearch = 1

 

 

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