Office 365 Device Support Changes

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Microsoft Office 365 is ending support for older, obsolete HTTPS security protocols on October 31st, 2018. The following devices and browsers are known to be incompatible with current HTTPS security protocols and may no longer be able to connect to email:

  • 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 Win Phone 8.0
  • Safari 6.0.4/OS X10.8.4 and earlier versions

More information from Microsoft Support:

“As of October 31, 2018, Microsoft Office 365 will no longer support TLS 1.0 and 1.1.

By October 31, 2018, all client-server and browser-server combinations should use TLS version 1.2 (or a later version) to ensure connection without issues to Office 365 services. This may require updates to certain client-server and browser-server combinations.

If you do not update to TLS version 1.2 (or later) by October 31, 2018, you may experience issues when connecting to Office 365. If you experience an issue related to the use of an old TLS version after October 31, 2018, you will be required to update to TLS 1.2 as part of the resolution.

Although current analysis of connections to Microsoft Online services shows that most services/endpoints see very little TLS 1.0 and 1.1 usage, we are providing notice of this change so that you can update any affected clients or servers as necessary before support for TLS 1.0 and 1.1 ends. If you are using any on-premises infrastructure for hybrid scenarios or Active Directory Federation Services, make sure that the infrastructure can support both inbound and outbound connections that use TLS 1.2.“