SharePoint Online is embracing Office 365 Sensitivity Labels to allow protected documents to be processed by indexing and available to content searches. The Office Online apps (Word, Excel, and PowerPoint) also support the application of sensitivity labels. The only disappointment is that the SharePoint Online and OneDrive for Business browser interfaces don't allow labels to be applied to documents
https://www.petri.com/sharepoint-online-embraces-office-365-sensitivity-labels
