We've just migrated our GW8 system (NW6.5) over to GW2014. The primary domain came over first, upgraded, then loaded. Showed 2014 as the version straight away. Seemed OK, so then upgraded the PO that hangs off it. Loaded the PO, but the domain showed the link closed. Realised it's because the NW6.5 system had direct PO links, so changed them to TCPIP. Restarted the PO and the MTA web console still shows PO link closed with "Missing or incomplete address information" as the reason.
Any tips gratefully appreciated! I'm in the UK so if I got a quick reply to this that would be SUPERB!