How to Merge an Outlook\Exchange Autocomplete with Another

  1. I recommending backing up the Autocomplete from both Accounts via Backing up and restoring the AutoComplete cache of Outlook 2010, 2013, 2016, 2019 and Office 365 –
  2. Login to account you would like to copy the autocomplete from in Outlook , it will create a C:\Users\%username%\AppData\Local\Microsoft\Outlook\RoamCache\Stream_Autocomplete_0_XXXXXXXXXX1.dat file
  3. You can use nk2 editor to read this if you want to confirm 
  4. Login to the account you would like to copy the to , it will create a C:\Users\%username%\AppData\Local\Microsoft\Outlook\RoamCache\Stream_Autocomplete_0_XXXXXXXXXX2.dat file
  5. Cloud outlook and rename Stream_Autocomplete_0_XXXXXXXXXX2.dat to Stream_Autocomplete_0_XXXXXXXXXX2.datold and rename Stream_Autocomplete_0_XXXXXXXXXX1.dat to Stream_Autocomplete_0_XXXXXXXXXX2.dat. 
  6. Reopen outlook
  7. Add a new contact that’s not in your autocomplete e.g. and send an email
  8. Close Outlook and reopen it
  9. It should merge your old Autocomplete with your existing one
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Tags: dat, merge, Outlook, Stream_Autocomplete_0

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