Anomaly of MailItemAccess by Other Users Mailbox [Nobelium]

This query looks for users accessing multiple other users' mailboxes, or accessing multiple folders in another user's mailbox. This query is inspired by an Azure Sentinel detection. Reference - https://github.com/Azure/Azure-Sentinel/blob/master/Hunting%20Queries/OfficeActivity/AnomolousUserAccessingOtherUsersMailbox.yaml