Hello Microsoft Partners!
Do you have questions about upgrading to the newest Windows Server OS? Are you looking for guidance on how to upgrade from one OS to another? And what consideration needs to be taken before and after upgrading?
If so, take a look at the Windows Server Upgrade Center which provides step-by-step guidance for modernizing your datacenter.
When you upgrade a Windows Server in-place, you move from an existing operating system release to a more recent release while staying on the same hardware. Windows Server can be upgraded in-place at least one, and sometimes two versions forward. For example, Windows Server 2012 R2 and Windows Server 2016 can be upgraded in-place to Windows Server 2019.
The following graphic shows the upgrade paths for Windows Server. Downward pointing arrows represent the supported upgrade path moving from older versions up to Windows Server 2019. You can upgrade from an evaluation version of the operating system to a retail version, from an older retail version to a newer version, or, in some cases, from a volume-licensed edition of the operating system to an ordinary retail edition.
Hope you find this resource helpful!