Today, when line-of-business managers and end users need to connect with their external business partners, they use an assortment of different tools, some more ill-suited than others. This communication involves a lot of ad hoc emails and mailing lists. Some people on the team might use Hangouts, others might use text messaging. We see folks that use Skype, WhatsApp, and even private Facebook groups and Messenger. For document collaboration, end users rely on their personal Box and Dropbox accounts to get around email attachment restrictions.