Outlook now displays a warning when you add external email recipients to a newsletter.

Release notes for Outlook for Windows (new)

March 20, 2026

• Meeting templates: You can now create personal meeting templates and access templates set by your IT admin from the New Event dropdown in Calendar.
• You can now import email from PST files in Settings> Files>Import.
• Newsletters: Outlook now displays a warning when you add external email recipients to a newsletter.