2012-08-13: OS X Server: "The document 'file name' is on a volume that does not support permanent version storage" alert (affected: Lion Server, OS X Server (Mountain Lion))
2016-07-26: HT203598 has been archived and is no longer updated by Apple.
I can find nothing current, from Apple, about either the absence or the presence of support for permanent version storage in its most recent Server product for Mac OS X.
Has macOS Server gained support for permanent version storage?
Or is there simply no current support document about the absence of support?