Windows 11 support for TLS 1.3 stopping Cloudwork logins to Office

Windows 11 clients unable to login to Office

Microsoft are enforcing a very hard implementation of TLS 1.3 in Windows 11. At the moment our Cloudwork infra-structure needs an upgrade to support TLS 1.3 but that upgrade will be very disruptive as it involves an entire re-start of our technology stack - something one does not do lightly especially at one of the busiest times of the year for schools.

We have a temporary fix for the problem...

For the moment users on Windows 11 will need to disable TLS 1.3.

This option is under Internet Options -> Advanced

It seems that windows 11's implementation of TLS 1.3 prevents Windows 11 from correctly talking to Cloudwork, however forcing it to use TLS 1.2 works.

We're working on a solution to this issue, however it will represent a fairly large infrastructure update to Cloudwork, and is unlikely to be completed before the Christmas break.

Once we have upgraded our infrastructure to support TLS 1.3 we will send out an advisory at which point those users that have implemented the above fix will need to undo it.