Moving autocomplete files between profiles on Outlook 2010/2013/2016

This is the process I use for moving autocomplete data from one profile to another profile when you don't have an Exchange server.  This is applicable for Outlook 2010/2013/2016.

First, send an email from the new mail profile and note the time/date when you sent the email.  This time/date will be important shortly.

Now, go to:
c:\users\%username%\appdata\local\microsoft\outlook\roamcache

You're looking for two autocomplete files.  Both files start with stream_autocomplete . . .

You're looking for one stream_autocomplete file with the time/date when you sent the email just now.
You're also looking for the stream_autocomplete that is much larger and represents the autocomplete for the old profile (this will be a file between 10 KB and 5000 KB) with a time/date that corresponds to the last time you sent an email from the old profile.

We'll call the new file "new_autocomplete" and the old file "old_autocomplete" going forward.

Open Outlook.  Put Outlook offline.

in c:\users\%username%\appdata\local\microsoft\outlook\roamcache . . .

Copy and paste old_autocomplete so you have old_autocomplete and old_autocomplete_copy.

Highlight new_autocomplete and choose rename.  Hit control C so you have the name of new_autocomplete in your clipboard.  Add a single letter to the end of new_autocomplete so new_autocomplete now has a new name.

Highlight old_autocomplete_copy and choose rename.  Paste the name you have on your clipboard.  Now, your copy of old_autocomplete will have new_autocomplete's name.

Close Outlook.
Wait 30 seconds
Reopen Outlook.
Put Outlook onlne.

Test autocomplete.

That's it.

importing autocomplete in Outlook 2010 from 2003 with complicating Google factor

I had a weird situation where I was taking an autocomplete database from Outlook 2003 to Outlook 2010 where the account was on Google Apps.

When you set up a Google Apps account, it pulls down an autocomplete database from the Google Apps account (presumably the autocomplete that exists from when you use webmail).  But if you were primarily using Outlook (2003 in this case), there is a much larger autocomplete database that you need to add.

You're supposed to be able follow the methods listed here, but they weren't working for me using the NK2 file I had and trying to bring them into Outlook 2010:
http://support.microsoft.com/kb/980542

What I ended up doing was creating a POP account that allowed me to to import the NK2 file (in my case, I put the NK2 file in the appropriate location \appdata\roaming\microsoft\outlook and created an Outlook profile with a POP account with the same name and it imported automatically).  With that, I had NK2 file in the autocomplete stream file.

I tried several times to rename the existing autocomplete stream file with the stream file with no success.  The file would revert back to an 1 KB file with no autocomplete data.  I can't explain, but I just kept trying and eventually, one time of renaming the stream file with the data I wanted with the name that was associated with Outlook worked.  I can't explain what I did differently, but I just kept trying (with the ocassional reboot) and it worked.