Skip to main content
Future Students Alumni Library Athletics & Recreation
 Mobile
Students
  • Studying & Academics
    • Academic Calendars and Governance
    • Academic Integrity
    • Advising and Support
    • Exams
    • Global Engagement and Exchanges
    • Graduate and Postdoctoral Studies
    • Library
    • Online Learning
    • Programs
    • Research
  • Student Life
    • Dean of Students
    • Dining on Campus
    • Equity, Diversity and Inclusion
    • Indigenous Student Services
    • International Student Support
    • Residence and Off-Campus Housing
    • Student Organizations
    • Sustainability
  • Wellness & Recreation
    • Athletics and Recreation
    • Gendered Violence Prevention and Support
    • Human Rights and Conflict Management
    • Safety
    • Student Wellness Centre
    • Wellness Education
  • Work, Leadership & Volunteering
    • Career and Employment Support
    • Community and Workplace Partnerships
    • Co-op
    • Innovation and Entrepreneurship
    • Experience Record
    • Working on Campus
    • Student Teaching Development
    • Volunteering
  • Registration & Finances
    • Convocation and Graduation
    • Enrolment Services
    • Financial Aid
    • Graduate Funding and Awards
    • Money Management
    • OneCard
    • Course Registration Guide
    • Scholarships and Bursaries
    • Tuition and Fees
  • Services & Spaces
    • Childcare Services
    • Classrooms and Spaces
    • Educational Technologies
    • Parking and Transportation
    • Printing Services
    • Prism Resources
    • Retail and Mail Services
    • Tech Services

    • Home
    • Services and Spaces
    • Tech Services
    • Microsoft to Block Dangerous Embedded OneNote Files on Windows

    Microsoft to Block Dangerous Embedded OneNote Files on Windows

    April 10, 2023
    Print | PDF

    To improve security against high-risk phishing file types, Microsoft will be blocking embedded OneNote files with potentially dangerous extensions. Please note this change will only affect the OneNote app on Windows – this change will not affect OneNote on Mac, OneNote on Android or iOS devices, OneNote on the web, or OneNote for Windows 10*. 

    This change will start rolling out late April 2023 and is expected to be complete by May 2023. The list of blocked file types for OneNote will be consistent with the file types currently blocked in Outlook, Word, Excel, and PowerPoint.

    WHAT WILL CHANGE

    Currently when you try to open a harmful attachment in OneNote, you'll receive a pop-up that warns you that the attachment you're trying to open may be harmful, but you are able to open the attachment by clicking 'OK'.

    screenshot of the warning pop-up described above

    After this change is rolled out, you'll receive a pop-up that says "Your administrator has blocked your ability to open this file type in OneNote" when you try to open a harmful attachment, and you will not be able to open the attachment in OneNote.

    screenshot of the warning pop-up described above

    If you trust the sender of the file and want to proceed with opening the potentially harmful attachment, you will need to save and open the file on your computer.

    RESOURCES

    *Not sure which version of OneNote you're using on Windows? Read about the differences between OneNote and OneNote for Windows 10. 

    Unknown Spif - $key
    Wilfrid Laurier University
    • Locations, Maps & Parking
    • Contact Us
    • Accessibility
    • Campus Status
    • Social Media Directory
    • Instagram
    • Twitter
    • Facebook
    • Linked In
    • Email
    • Youtube

    WILFRID LAURIER UNIVERSITY

    • Waterloo
    • Brantford
    • Milton
    • Kitchener

    © 2025 Wilfrid Laurier University

    We use cookies on this site to enhance your experience.

    By selecting “Accept” and continuing to use this website, you consent to the use of cookies.