Re: Microsoft Active Directory
For Azure, there's actually two different things:
Azure ADFS, which is essentially a hosted version of ADFS that one your AzureAD tenant. If someone is moving from On-prem ADFS to Azure, they'll support configuring it, but not really recommending it because from what I was told, it's as much of a pain to setup and manage as the on-prem product.
AzureAD Connect, which is different enough that it's a separate product and SKU, but included with the AzureAD subscription. It also has hooks (more or less) built in for most products that support the SAML SSO specs.
Microsoft still has support for ADFS in Server 2019, but they really are pushing companies to move to Azure, because 'recurring revenue'.