Official support Microsoft

Question

How i can open a support case for windows server to Microsoft (our contract include support) ?

Answer 1

You can start a case here with product support.
https://support.serviceshub.microsoft.com/supportforbusiness

--please don't forget to Accept as answer if the reply is helpful--

Answer 2

A number of ways:

https://serviceshub.microsoft.com/home

https://support.microsoft.com/en-us/help/4051701/global-customer-service-phone-numbers

Do you have a TAM? You can contact that person directly for assistance as well