I'm trying to enable IFD for our Dynamics 365 on-prem server, and I'm seeing some odd behaviour. We have two orgs on the server. Before I enabled IFD, these could be reached (I'm just looking at internal access here, for now) by going to https://servername.domain.com/org1name and https://servername.domain.com/org2name . All good. However, once I enable IFD, then neither of those URLs work (still just internally). They both give 404s. However, https://servername.domain.com goes to org1. I cannot find how to get to org2.
I confirmed that this is what caused the change by disabling IFD, after which it immediately goes back to the previous behaviour. Re-enable, and back to the wrong/unexpected behaviour.
Is this expected behaviour? If so, how do I get to org2? If not, any idea as to what could've caused it/how to fix it?