How do I open an Archive file?

In order to have the most computer resources available, it's best to leave you Archive file closed and only open it when needed.

1. Go to: File > Open > Open Outlook Data File.
   
2. Select the Archive file you want to open and click OK. The Archive file will appear underneath your regular email file.
   

Source: https://support.microsoft.com/en-us/help/2720581/h...