Repairing Outlook 2010 Auto Complete Cache

Outlook2010The auto complete cache in Outlook remembers all of the addresses that you have emailed and auto completes them when you enter an email address into the To: (or CC: or BCC:) field in Outlook. There are numerous fixes around on the web, but this one sorted the issue for me today on a stubborn Windows 7 machine with Outlook 2010 installed (with Google App Sync).

  1. Close Outlook and go to %localappdata%\Microsoft\Outlook\ and rename RoamCache to old_RoamCache
  2. Restart Outlook using the command line switch /cleanautocompletecache (“C:\Program Files\Microsoft Office\Office14\Outlook.exe” /cleanautocompletecache). This will rebuild the autocomplete cache.

These steps are based on an article at Spiceworks here: http://community.spiceworks.com/how_to/show/16443-repair-autocomplete-cache-in-outlook-2010. The second step was missing in the official Microsoft article.

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