We are currently upgrading our sql servers and have a setup where we have sqla and sqlb which both replicate each other in case of any issues one then fails over to the other (high availability).

We are having an issue where it looks like our sage200 is setup to point to one of them rather than the availability group that manages which one to use.

Is this just a case of changing the config to look at the listener rather than direct to a single database? 

I have seen on the sage300 forum they say no but that seems to ask about having 2 seperate sages and not just the database replicated.