Outlook crashes every time it sends an email or accesses the Global Address List

I had an Outlook 2010 client today that would crash every time the user tried to send an email, click Check Names (ctrl-K), or update the offline address book. Sending or checking names would generate the typical Windows 7 error message saying, “Microsoft Outlook 2010 has stopped working. Windows can check online for a solution…” Attempting to download the offline address book just caused Outlook to stop responding.

The solution was to start Outlook with the CleanAutocompleteCache switch:

Outlook.exe /cleanautocompletecache

5 thoughts on “Outlook crashes every time it sends an email or accesses the Global Address List”

  1. ac says:

    this solution works on outlook 2013, thanks!

    1. jay c says:

      Good to hear, ac. Thanks for the feedback!

  2. Raymond L says:

    I’m glad to hear a solution for 2013 has been found but how does an “average Joe” (non-techie) like myself, implement this fix?

  3. jay c says:

    Hi Raymond.

    First, make sure that Outlook is not running. Then, on Windows Vista or 7, click on the Start button and type “outlook.exe /cleanautocompletecache” then press Enter.

  4. Gordon says:

    Thanks – solved the problem that has been annoying me for ages!

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