DocuBrain has completed compatibility testing and TechDoc 9 is compatible with Windows Server 2016. We now officially support installing and running TechDoc 9 on Windows Server 2016.
Note that if you are still running on Windows Server 2008 R2, you should begin preparing to upgrade your operating system. Microsoft ended mainstream support of Windows Server 2008 R2 on 01/13/2015 and currently plans to end extended support on 01/14/2020.