<p>Users of Microsoft's web-based email services have been hit by another round of technical difficulties, as the firm's Hotmail to Outlook.com upgrades gather pace.</p><p>According to the software giant's Service Status page, Hotmail and Outlook users have experienced email access problems since yesterday evening.</p><p>The firm's cloud-based storage service SkyDrive also experienced service troubles that made it difficult for users to add, edit and remove files, but these were fixed in the earlier hours of this morning.</p><p>"You might not be able to see all your email messages. We're working to restore service right now," said the company in a Hotmail service update.</p><p><a href="http://www.itpro.co.uk/email-clients/19408/hotmail-and-outlook-users-hit-fresh-round-service-troubles">Keep reading...</a></p>