Checking the guide/docs for Dynamics 365 while signed in from my work email(o365 business premium) at this link https://docs.microsoft.com/en-us/dynamics365/unified-operations/dev-itpro/dev-tools/get-evaluation-copy 

It opens up this page https://mbs.microsoft.com/customersource/global/AX/news-events/news/Microsoft_Dynamics_AX_Public_Preview which shows the message "The content of this page is locked. To access this information log in to CustomerSource."


And clicking on "CustomerSource" opens up a page which is giving this primitive server error:


It will be helpful if someone forwards it to somebody from Microsoft or they notice it!