Bill, sorry but the quote clearly states the opposite of what you're claiming.
[...] Office 365 and Outlook.com customer content is already encrypted when traveling between customers and Microsoft, [...]. In other areas we’re accelerating plans to provide encryption.
[my bold] While we know it's simply not true, unless you've specific conditions in place that by far aren't the most common ones to start with. No mention at all of upgrades there: upgrades are mentioned in "other areas".