<https://forums.slipstick.com/threads/96594-adding-enterprise-exchange-email-account-to-outlook-prevents-sending-via-outlook-com-account/>
<http://schema.org/dateModified>
<https://forums.slipstick.com/threads/96594-adding-enterprise-exchange-email-account-to-outlook-prevents-sending-via-outlook-com-account/#post-353650>