If you would like to have access to your archived emails on multiple computers or through the Outlook Web App, you can import your archived emails into your mailbox. This will add those emails back into your mailbox for viewing across platforms.
1. Open Outlook and click File in the upper left corner.
2. Click Open.
3. Click Import.
4. This will open a new window (pictured below). Select Import from another program or file. Click Next.
5.Select Outlook Data File (.pst) from the menu (you may need to scroll down to find it). Click Next.
7.This will open another window that will display your archived email files. Select the file you'd like to import and click Open.
8. It is recommended that you select Do not import duplicates unless you want the imported information to replace or duplicate items already in Outlook. Then click Next.
9.Set the options for importing items. The default settings usually don't need to be changed.
10. Click Finish.