Domain registration is being evaluated and remains on our long term road-map. However, it is not planned for CY 2019.
We are working on giving more control over authentication within Point-to-Site connectivity to Azure.
Bridget [MSFT]Hannu Piki commented
We as well would like to hear/see status update around this feature. Azure AD integration with MFA would be awesome!
IPv6 in Azure VNET is currently previewing globally- in ALL Azure Public cloud regions.
Announcement (Service Update): https://azure.microsoft.com/en-us/updates/public-preview-microsoft-adds-full-ipv6-support-for-azure-vnets/
Links to Documentation & Samples
Full documentation including sample scripts is available here: https://aka.ms/IPv6ForAzureVNETdoc
A sample JSON template is posted in the quickstart repository: https://azure.microsoft.com/en-us/resources/templates/ipv6-in-vnet/
DNSSEC remains on our long term roadmap, however it is unlikely to be available in CY 2019. If DNSSEC is a critical and immediate requirement for your business we’d suggest that you consider evaluating 3rd party DNS hosting solutions that provide this feature.