There is no VBO with such functionality in Blue Prism. To be honest, this question isn't really a blue prism centric question and your first call should be searching on google for APIs available for SharePoint. If such APIs calls are available in C#/VB, you should be on your way to developing a code stage in the object studio. My understanding of Share Point is, it has an email sending capacity so you can use email triggers instead to communicate information to Blue Prism. Since you already have a way to process mails using EWS API, this should be fairly easy for you.
