Troubleshooting / symptôme

Outlook is extremely slow

Outlook takes several seconds to open messages, change folder or start a search.

⌚ About 4 min read
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Real-world problem · V2

Quick troubleshooting view

What you are seeing

Outlook takes several seconds to open messages, change folder or start a search.

Likely causes
  1. Large box/cache
  2. Defective supplement
  3. Windows Indexation
First checks
  1. Test Outlook in Safe Mode
  2. Check box/cache size
  3. Checking Supplements
Recommended actions
  1. Disable the supplement in question
  2. Reduce or adjust the cache period when relevant
  3. Create a test profile
Start Symptom → Cause →
Message.Intermediate.

Outlook takes several seconds to open messages, change folder or start a search.

Important: relevez toujours le message d’erreur exact et l’heure du problème avant de modifier la configuration. Les actions proposées doivent être adaptées à votre environnement.

Causes probables

  • Large box/cache
  • Defective supplement
  • Windows Indexation
  • Corrupt Outlook Profile
  • Unstable network connection
  • Antivirus or DLP

Diagnostic étape par étape

  1. 1

    Test Outlook in Safe Mode

    This allows for the removal of certain supplements.

  2. 2

    Check box/cache size

    Check the local and server volumetrics.

  3. 3

    Checking Supplements

    Disable only those identified as suspects.

  4. 4

    Test webmail

    Compare the performance of the web service.

  5. 5

    Check the indexing

    Check the search/indexing status if the problem is primarily related to searches.

Commands utiles

Outlook.exe / Safe

Solutions possibles

  • Disable the supplement in question
  • Reduce or adjust the cache period when relevant
  • Create a test profile
  • Correct the identified network or service problem
Quand escalader ?

Clash if the problem concerns several users of the same holder or site.

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