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Oklahoma State University

End of Life - TLS 1.0 and 1.1

Microsoft has announced an end of life date for Transport Layer Security (TLS) 1.0 and 1.1 protocols in Microsoft Office 365. After October 15, 2020 all connections to Office 365 services will need to use TLS version 1.2 (or a later version) to avoid any issues in connectivity.
Users using the following clients should update to maintain uninterrupted access to Office 365:

Android 4.3 and earlier versions
Firefox version 5.0 and earlier versions
Internet Explorer 8-10 on Windows 7 and earlier versions
Internet Explorer 10 on Windows Phone 8.0
Safari 6.0.4/OS X 10.8.4 and earlier versions

If you have any questions, please contact the IT Helpdesk at or 405-744-4357.
Campuses Affected:
  • OSU-Stillwater
  • OSU-Tulsa
  • OSU Center for Health Services
  • OSU-Institute of Technology
  • OSU-Oklahoma City
  • Connors State College
  • Langston University
  • Panhandle State University
  • Northeastern Oklahoma A & M
  • Northern Oklahoma College at Stillwater
  • Services Affected:
    Email Services - Microsoft Office 365
    Announcement Contact Information: