Observed arrival · 2026-09-09
Klasseur: the Outlook filing add-in that explains itself
Klasseur files Outlook messages and attachments into SharePoint, Teams, or OneDrive, with unusually detailed deployment and permission notes for Microsoft 365 administrators.
Field notes
Deployment occurs through Microsoft 365 Integrated Apps using a published manifest URL, followed by assignment to people or groups. The permission section distinguishes ordinary archiving from the separately requested Sites.Manage.All permission, which the publisher says is used only when preparing a library. Requirements include Exchange Online, SharePoint Online or OneDrive for Business, and Outlook support for Mailbox 1.13 and Nested App Auth 1.1. The page says archived files remain in the organization’s own storage after removal.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue