Does Milestone VMS 2016 version support H265
As this is not related to software development with the MIP SDK, which is the focus of this forum, please ask again in the support community, you should get better help from the partners using the support community.
https://supportcommunity.milestonesys.com
Also, VMS 2016 is terminated and no longer supported. See this page Product Lifecycle
https://www.milestonesys.com/support/tools-and-references/product-lifecycle/