 Amazon's corporate email system appeared to be experiencing issues Friday morning. The company uses Microsoft Outlook for email, and many of the company's employees also use the communications platform Slack. Amazon didn't immediately respond to questions. The financial sector was largely running as usual, but some companies reported issues. Visa said it was aware of reports of people unable to make payments. JP Morgan staff had trouble logging onto computers. Charles Schwab said online systems were unavailable. The president was even briefed.