— John Craddock (@john_craddock) 30. November 2017
A few days before, Alex Simmons provided a short blog post about Azure AD retirement from the classic portal. That blog post provides an update to the Techcommunity blog post from Oct 01, 2017 this year, which already announces the Azure AD retirement from the classic portal – as well as the classic portal as a whole.
In the update article you can read that AzureAD features will not be retired on Nov 30, 2018, but will be retired on January 8th, 2018 now. So you still need to hury up and move your conditional access and Azure AD tools to the new portal as described in the original article.
If you didn’t already finish your migration, I suggest you should really move now.