session log: Neptune outage recovery + Exchange 2019 migration plan
Post-reboot recovery phase: WS2022 upgrade (done 2026-04-22) identified
as root cause — Exchange 2016 unsupported on WS2022. Mail flow restored
at 14:32 via explicit DNS-server override on TransportServer (edgetransport
on WS2022 ignores OS suffix search). Rollback unavailable (all paths dead).
Migration planning phase: Exchange 2019 on fresh WS2022 VM picked over
2016-rebuild. Config snapshot captured to C:\NeptuneConfigExport-20260423\
(34 files, 22 config areas, 56-mailbox CSV inventory, SBR configs).
Full 6-phase migration runbook written covering prereqs, schema prep,
install+config port, mailbox moves, cutover, and carcass force-removal.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Mike Swanson
b6d00207ff