Outlook 2010 autocomplete clears cache when exiting Outlook

[guest]

I have a user whose autocomplete stopped working. Windows 7 x64 and Outlook 2010 x32.

I've tried Outlook.exe /CleanAutoCompleteCache (no luck)

I deleted the "RoamCache" folder under %AppData%\Local\Microsoft\Outlook and re-opened Outlook watched the RoamCache folder get re-created; however, the Stream_Autocomplete*.dat file is not getting created. I confirmed that "Use Auto-Complete List to suggest names..." is checked within > Options > Mail > Send messages settings.

Can someone help me find an answer to why the Stream_Autocomplete.dat file is not getting created, there are a number of other .dat files that get recreated?

[guest]

When you start Microsoft Outlook 2010 for the first time, your nickname cache (stored in the profilename.nk2 file) is imported into a hidden message in your default message store

For example, if you are using a Microsoft Exchange account, the nickname cache is imported into a hidden message in the Exchange mailbox

Outlook 2010 does not use the .nk2 file for maintaining your nickname cache. All updates to your nickname cache in Outlook 2010 are made to the hidden message in your default message store

The nickname cache has been moved to the Exchange mailbox, which means that your auto-complete list will now roam with you to different machines. The nickname cache (.nk2 file in Outlook 2007) has been turned into an associated message of your Inbox folder. This lets the cache roam with your Exchange mailbox so that you have access to your cache on any client you use to access your mailbox

To address your issue please follow the below steps:

1. Delete the Roam Cache from location C:\Users\User Profile\AppData\Local\Microsoft\Outlook\RoamCache

2. Open Outlook. Go to File --> Options --> Mail --> Send Messages

4. Click "Empty Auto-Complete List"

5. Uncheck the option of "Use Auto-Complete List to suggest names"

6. Close Outlook and restart it again

7. Go to File --> Options --> Mail --> Send Messages

8. Check the option of "Use Auto-Complete List to suggest names"

9. Close Outlook and restart it again

10. Create a new email message and send it.

11. Close Outlook and restart.

12. Verify if the entry from Step 10 is available.