Delegate Account

A Delegate Account is not associated with an actual person. A Delegate Account is a tenant account that Cloud App Security requires to integrate with Microsoft Office 365 services. For Exchange Online, Cloud App Security uses the Delegate Account to access mailbox accounts designated for protection, and "listens" for arriving email messages. For SharePoint Online and OneDrive for Business, Cloud App Security uses the Delegate Account to access site collections and user profiles designated for protection, and "listens" for users uploading, creating, synchronizing, or modifying files.