Outlook now uses Transport Layer Security (TLS) encryption for both incoming and outgoing mails, which means communications are encrypted in transit to and from other email providers, as long as they support the TLS protocol. Our goal is to provide even greater protection for data across all the great Microsoft services,” said Matt Thomlinson, vice president at Trustworthy Computing Security, Microsoft. “We are in the midst of a comprehensive engineering effort to strengthen encryption across our networks and services. Microsoft added encryption to emailing service and to its cloud storage service, OneDrive, to enhance security of its customers, the company announced in a blog post.