How to clear the Outlook autocomplete cache

  • Synopsis

    This guide will show you how to clear the Outlook autocomplete cache.
  • Applicable to

    All hosted Exchange accounts.
  • Prerequisite

    • a hosted Exchange account.
  • How to

    There are 2 ways of fixing this issue: #550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ##

    Easy method:

    1. Start typing the email address you would like to clear from the cache until outlook displays it .
      MSO_ClearCache_1
    2. Press the down arrow key to select the email address
    3. Press the delete button.

    More involved method:

    Note: It will allow you to clear all the entries from the address cache. (outlook.nk2)
    1. Close Outlook and make sure it is not running using the task manager.
    2. Open Windows Explorer and Paste %APPDATA%\Microsoft\Outlook into the address bar.
      MSO_ClearCache_2
    3. Delete the file Outlook.nk2.
      MSO_ClearCache_3

    Outlook 2010 only:

    Go to FileOptionMail, and then click on the Empty Auto-Complete List button under the Send Messages header.
    emptyautocompletion

    If you need further assistance, please do not hesitate to contact us.

  • Keywords

    Outlook, Clear Cache
  • 7 Users Found This Useful
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