DHCP (Dynamic Host Configuration Protocol Server) windows server role is not supported in Microsoft Azure virtual Machines. Please
see https://support.microsoft.com/kb/2721672?wa=wsignin1.0 for more info.
Also to add, it doesn't have a static IP defined. If you defined a static IP through the Azure PowerShell but the DHCP server software
still sees it as 'dynamic.'Please see https://support.microsoft.com/kb/2721672?wa=wsignin1.0 for more info.