Changes to the Microsoft Email service

Subject: Changes to the Microsoft Email service

Microsoft has announced that from October 1, 2019, it will disable support for the old security protocols TLS 1.0 and 1.1 for Office 365.  TLS is the protocol used to encrypt mail over the network. Microsoft will require organisations to use version 1.2 to improve security.

The ANU uses the Microsoft Office 365 platform for its official communications and will be affected by this implementation. ITS is therefore providing this advice to ensure all ANU staff have the opportunity to be compliant.  TLS 1.2 was released in 2011 so any relatively new computers, operating systems and email clients should not notice any difference once the change is implemented. However, ITS managed equipment using any of the older software listed below may need to utilise the Web interface for email, until an upgrade can be undertaken:

  • Windows Vista and older
  • Mac OS X 10.9 Mavericks and older
  • Outlook 2010 or older
  • iOS 5 or older
  • Android 4.3 or older

Following the change, combinations of operating system and browsers and/or email clients that are unable to use TLS 1.2 or later will not be able to connect to Office 365.

If post 1st of October any ITS managed devices are impacted by this change and new emails are not viewable, please contact the ITS ServiceDesk at or on 612 54321.