- Outlook patch (Construct 19426.20218) broke “Encrypt Solely” emails, exhibiting unreadable attachments
- Workarounds: use Choices ribbon encryption or revert to Construct 19426.20186 by way of Command Immediate
- Microsoft additionally disabled inline SVGs in Outlook for Internet and new Outlook for Home windows
Microsoft launched a brand new patch for traditional Outlook, and broke how encrypted emails work. It’s presently engaged on a repair, and within the meantime, it provided a number of methods to open encrypted emails within the fashionable consumer app.
In a brief replace posted on January 6, Microsoft mentioned that after updating to Present Channel Model 2511 (Construct 19426.20218), e mail recipients could not have the ability to open “Encrypt Solely” messages.
The error manifests within the Studying Pane, the place customers may get a message saying “This message with restricted permission can’t be considered within the studying pane till you confirm your credentials. Open the merchandise to learn its contents and confirm your credentials.”
Two workarounds
After opening the e-mail, customers will discover an attachment message_v2.rpmsg and gained’t have the ability to learn the contents.
The issue occurs for customers who encrypt the e-mail utilizing the settings beneath the e-mail File dialog (File > Encrypt), Microsoft additional defined. To forestall the problem, there are two potential workarounds. For the primary one, customers ought to choose the Choices ribbon, then choose Encrypt, and select Encrypt or Do Not Ahead.
The second workaround is to revert to a construct earlier than the problem began after which ship the e-mail. The problem began with construct 19426.20218, and the subsequent prior construct that works is 19426.20186. To revert Workplace, customers ought to open an elevated Command Immediate, and run this command:
“%programfilespercentCommon FilesMicrosoft SharedClickToRunofficec2rclient.exe” /replace person updatetoversion=16.0.19426.20186
E-mail is by far essentially the most attacked vector, and the go-to communications platform for preliminary compromise. Microsoft usually patches Outlook to shut completely different holes and has, solely just lately, modified how Outlook handles SVG photos.
In a Microsoft 365 Message Heart replace, the tech large mentioned, “Inline SVG photos will now not be displayed in Outlook for Internet or the brand new Outlook for Home windows. As a substitute, customers will see clean areas the place these photos would have appeared.”
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