We're still on ver 12.1.6_MP6. So is the server.
For ver 14 it sounds like a clean install is recommended (or the only option). Uninstall SEP ver 12. Install ver 14.
With users in several locations, desktops and laptops, etc. I don't see that being possible even if it's all automated, not to switch all users to ver 14 at once.
Standing up a new SEPM ver 14 server might be an option. Easy way to move to a newer OS, and it's a fresh SEPM install of ver 14.
I was told our license covers our current ver 12 and ver 14.
Is it an option to keep our ver 12 SEPM server and ver 12 SEP users and set up a completely separate ver 14 SEPM server and start installing ver 14 on user machines? Or can ver 12 user machines still pull updates from a ver 14 SEPM server? I'm not seeing a way to switch to ver 14 without standing up a new server, at least not a way that doesn't leave machines hanging for a while.