Hoi,
nein, wird nicht offiziell in der Version unterstützt. Auch 5.0.12 nicht.
Ich kann aber nicht beurteilen, in wie weit das so ein Problem verursachen könnte.
Aus den Release Notes :
Domino server
Beginning in Release 5, Windows NT 4.0 Workstation and Server (Intel Pentium) are supported platforms for the Domino server. Windows NT Server Enterprise Edition (Intel Pentium) are supported platforms for the Domino server.
Beginning in Release 5, Windows 95 and Windows 98 are supported platforms for the Domino server.
Beginning with Release 5.0.3, Windows 2000 Server is a supported platform for the Domino server. Support for Windows 2000 Advanced Server and Windows 2000 Datacenter began with Release 5.0.7.
Beginning with Release 5.0.6, Windows Millennium Edition is a supported platform for the Domino server. Please refer to additional documentation in this section of the Release Notes for more information about Windows requirements and service packs.