This could be of interest if companies do not want to or for any reason cannot use an Outlook add-in to upload e-mails to apps in the cloud. With this solution you can simply use your browser after adjusting the security settings.

One use case could be the lead or opportunity management in a CRM related scenario. The sales man could simply attach the e-mail in the CRM and afterwards it would be available for all of his colleagues. As the meta data of the e-mail (e.g. subject, body) is also transferred you could easily search through all your and your colleague's mails that are only relevant for the CRM.