How to repair the Outlook autocomplete cache


This guide will show you how to repair the Outlook autocomplete cache.


  • A Sherweb hosted Exchange account.

How to

It may happen that the Autocomplete Cache gets corrupted with the following symptoms:

  • an e-mail address added to the autocomplete does not appear any more 24 hours after being removed
  • or the autocomplete cache becomes empty 24 hours after the addition . 

This issue is solved by repairing the cache. 


  1. Close Outlook and make sure its process is not running using the Task manager.
  2. Open Windows Explorer.
  3. Copy-paste the following string %USERPROFILE%\AppData\Local\Microsoft\Outlook\RoamCache into the address bar. 
  4. Delete any .dat file which name starts by Stream_Autocomplete_0_.
  5. Restart Outlook. This will create a new and healthy Stream_Autocomplete file for a brand new cache.


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

Applicable to

All Sherweb hosted Exchange accounts