How to backup email in Microsoft Outlook?

You need to export .pst file data from your Microsoft Outlook.

  1. On the File menu, click Import And Export ...
     
  2. Click Export To File, and then click Next.

    Export
     

  3. Click Personal Folder File (.pst) , and then click Next.

    Export pst
     

  4. You can export your entire mailbox (including all subfolders) by clicking your mail folder, select Include subfolders and then press Next. You can also select any parituclar folder to export by selecting the appropriate folder. 
     
  5. Click the Browse button, and then select the location to save the .pst file.

    Export finish
     

  6. In the File Name box, type a descriptive file name for the .pst file, and then click OK. (default is backup.pst)
     
  7. Click Finish.