encrypt only

Microsoft’s January Current Channel update for Classic Outlook has introduced a high-impact regression: messages protected with the Encrypt Only option sometimes fail to render in the Reading Pane and instead appear to recipients as an unreadable attachment named message_v2.rpmsg, leaving...

A quiet but consequential Outlook update has left some Windows users unable to open messages protected with Microsoft’s “Encrypt Only” setting, turning sensitive emails into unreadable attachments and forcing administrators and senders into an urgent triage mode until a permanent fix ships...

Microsoft has confirmed that a recent Current Channel update to Classic Outlook (Version 2511, Build 19426.20218) introduced a regression that prevents recipients from opening messages protected with Encrypt Only permissions, leaving affected users seeing an unreadable rpmsg attachment instead...