Leaked Microsoft memo says Slack, AWS, Google Docs, PagerDuty, and even GitHub are prohibited or discouraged from internal use, primarily over security concerns (GeekWire)

GeekWire:
Leaked Microsoft memo says Slack, AWS, Google Docs, PagerDuty, and even GitHub are prohibited or discouraged from internal use, primarily over security concerns  —  As Slack makes its stock market debut, there's a major company that won't be allowing its employees to use the business collaboration …