RE: Microsoft Dynamics GP and an alternative for two way replication
And another thought.....
Between the two instances, are they setup with the following architecture?
Instance 1
- company A
- company B
Instance 2
- company A
- company B
If so how will things like year-end close work? Which instance will be initiating this? Instance 1, Instance 2, either or? If this is the case then you need an almost near-real time sync between the two so transactions won't be missed where instance 1 might post a batch 15 minutes before Instance 2 runs a close and if the sync isn't near real-time then depending on the lag it might not make it to Instance 2 before the close process.
This is a real conundrum..... I'm not sure how this should be tackled but what I do know is that the client should take a different approach to remove this unnecessary complexity. This is where a potential "teachable moment" comes in to play and the consultant which I'm assuming you are because you mentioned this is for a client should step in and offer another solution that might make life for you and the client much less complex with less headaches because I can see where this could get hairy. :)