Microsoft Outlook to Block MSIX Attachments Starting November
Microsoft says the change will block a little-used Windows package format by default, while administrators can still allow it in Exchange Online policies.
10 Articles
10 Articles
Microsoft will block two Windows installer formats in Outlook from November
Microsoft will add .msix and .msixbundle to Outlook’s blocked attachment list in early November, closing an email route for a packaging format its own threat researchers watched four criminal groups abuse in 2023. Renaming the extension still gets a package through, and the change lands as a default policy edit in every Exchange Online tenant, […] This story continues at The Next Web
The Register
IT Security News - cybersecurity, infosecurity newsMicrosoft extends the Outlook naughty step with two more file types
You didn't really want to be sending around .msix and .msixbundle files, did you?
Outlook will block two Windows installer formats since November, a measure that Microsoft links to mail security, but that can be bypassed if files change their name or arrive via links. Automatic setting also puts the focus on who defines the digital policies used by European institutions.
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