EML file format is supported by Windows Live Mail and Outlook does same in form of PST file. To convert Windows Live Mailbox to Outlook format there is need of professional EML to PST converter software. Firstly I tried manual method to migrate from Windows Live Mail to Outlook but it was a risky and tedious job. Then I tried EML to PST converter " http://www.eml-to-pst-converter.recoverfilesdata.com/ " to migrate from windows Live Mail to Outlook format and have a successful file conversion. I would suggest you same to opt for same tool to migrate from EML to PST file format.
Edited by KennethButters on 02/01/16 02:24 AM.