Restore autocomplete

[dkanderb]

Hi
I disconnected a faulty mailbox on my on-prem exchange server. After creating a new mailbox to the user, I restored the inbox. Now the autocomplete data is gone. Autocomplete is history of typed email addresses (previously NK2 file). Is there a way to restore this?

[HannesK]

Hello,
and welcome to the forums. As far as I remember, that's expected behavior.

Best regards,
Hannes

[dkanderb]

So it is not possible to do a 100% restore ?

Outlook 2010 or Outlook 2013 reads the autocomplete stream from a message in the Associated Contents table of the Inbox of the mail account's delivery store. This hidden message has a message class and subject of IPM.Configuration.Autocomplete. The autocomplete stream is stored on this message in the PR_ROAMING_BINARYSTREAM property (PidTagRoamingBinary Canonical Property).

[HannesK]

I confirmed with my colleagues and the Explorer does not restore that.

Theoretically it might work by booting the Exchange & domain controller in a test virtual lab and then try to get the hidden message with the MFCMAPI tool. But that's untested from our side.