Since old farm was running K2 5.2 on WS2012 R2, we stood up new servers running WS2016 and added them to the existing farm running 5.2.
We then removed the old servers from the load balancer and turned off the K2 services. Now that K2 was running on the new servers running WS 2016, we upgraded the farm to 5.3.
I read somewhere that K2 Five automatically disables old nodes that don't respond. I've already removed the licenses from the K2 Management portal. Can anyone confirm if we still need to work with K2 Support to remove the entries from the database?