howto://fix Outlook’s Autocomplete Cache

Problem

Outlook 2013 autocomplete stops working. Outlook works fine otherwise.

Cause

Probably nickname cache corruption.

Fix

You can use NK2Edit to fix a corrupt nickname cache file.

  1. Have Outlook open.
  2. Download and install NK2Edit from http://nirsoft.net/utils/outlook_nk2_edit.html
  3. When prompted run it. It will automatically open your nickname cache file and prompt you about the total entries versus good entries.
  4. Close Outlook.
  5. Save your nickname cache file (default save.)
  6. Reopen Outlook and confirm your autocomplete now works.

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